Answer to basketball simulation

If I set up my simulation like this:

01-72 = makes shot
73-00 = misses

here's some digits:

5730 3485 3246 75 4563
2pts 1pt 2pts 0pts 2pts.

For the 5 runs above my average would be: (2 + 1 + 2 + 0 + 2)/5 = 1.4

That's the simulation.

Now for the expected value

P(0) = 0.28 (misses first shot and is done)
P(1) = (.72)*(.28) (makes the first, misses the second)
P(2) = (.72)^2 (makes both)

Now just run the expected value formula with 0, 1, 2 and the 3 probabilities.

Answers, comments and hints to the review

3a) Note that the problem says that the tickets are bought at the same time for the same price. This makes the formula 3C + 5F.

If the each ticket was bought separately, that would make the formula C + C + C + F + F + ... The mean is the same for either formula. But if the second formula was used, you'd have to do the Pythagorean formula thing.

3b) First do 3C = 450 and 5F = 500; then do sqrt(450^2 + 500^2)

3c) This is only about ONE of each tix: C - F. You can take it from there...

6) Make a 2-way table: 51% in the upper left corner. The other two numbers go on the outside.

a) only 3% is left in the lower right corner
b) P(left|right) = 51/82 = 62.2%. Since P(left) = 66%, this is fairly different, so they are not independent.

7a) 1 - (89/90)^10
7b) 1 - (9/10)^10
7c) 1 - (89/90)^5*(9/10)^5

25d) (0.93)^4*(0.07)

28a) mean = 4

28b) sd = 3.2

28c) Think and read carefully! If the first is bigger than the second then:

(first - second) > zero

So we want to use the mean and sd from above to compare to zero:
z = (0 - 4)/3.2 = -1.249
P(z>-1.249) = (using normalcdf) = 89.4%

42a) 1/100 = 0.01

42b) (.99)(.99)(.01) = 0.009801

42c) (.99)^100 = 0.366

42d) You want to be first!


42e) It doesn't matter! Everyone has a 1% chance!

Now if you're thinking carefully about (e), you might be thinking: "Hey, don't the probabilities change?" Watch this!

Prob(3rd person wins) = (99/100)*(98/99)*(1/98) = 1% (notice how all the fractions reduce!)
Pretty cool, huh?

I will check e-mail at about 10-ish tonight. If you are feeling frustrated, drop a line to:

mrmathman @ gmail.com
I will reply tonight.

Good luck!

Review Answers

It is 8:20pm and I'm starting to put up some answers. Here they come...

THE LAST ASSIGNMENT OF 07!!!

Unit IV Review #3, 6, 7, 23, 25, 28, 42
Ch. 11 #15:  Run 10 times and find the expected value of this problem in theory.

07 is finishing...

Friday:  Ch. 8 #25, 35;  Ch. 10 #1
Monday:  Ch. 11 #2, 5, 19

Review

Wednesday:  we did a 2-page green worksheet that is an excellent probability review.
Thursday:  Unit I review; Page 106 #8, 15, 16, 30

Rules!

Ch. 16 #24, 28

Answers:
24a)  60, 12
b) 6, 1.5
c) 92, 12.37
d) 68, 12.37
e) X + X = 160, 16.97

28a) 10
b) 2.68
c) The seed packets need to be independent of each other.  If they all came from the same batch, they might not be independent.

The end of Unit 07

No homework tonight.

Review

Unit IV Review #1, 5a, 15ab, 16ac, 35-37

Even Answers:
16a) 38.9%
16c) 79.3%

36a) 59.29%
36b) 40.71%
36c) 5.29%
36d) 0.25%

Thursday

Article #7

More Expected Value

Ch. 16 #3, 5, 21
Scramble #2

Expected Value

Ch. 16 #16, 17

Quiz day

Scramble #1 for homework

Answers to Friday's work

Chapter 14 #12a)
1. 0.45
2. 0.87

Chapter 14 #12b)
1. (0.55)^2 = 0.3025
2. (0.45)^2 = 0.2025
3. 1 - (0.87)^2 = 0.2431

Chapter 15 #8
a) P(male | cat) = 6/18 = 0.333
b) P(cat | female) = 12/28 = 0.429
c) P(female | dog) = 16/24

Chapter 15 #10
a) 0.62
b) 0.26/0.30 = 0.867
c) 0.12/0.62 = 0.194
d) 0.66

Chapter 15 #24
No! P(death penalty) = 62%, but P(dp | rep) = 26/30 = 86.7% and P(dp
| dem) = 12/36 = 33%, so party is clearly NOT independent of party!

Quiz on Monday!!!

Answers to Thursday's work

Ch. 15 #4:
a) 0.14
b) 0.23
c) 0.77

Ch. 15 #20
a) P(Canada | Mexico) = 0.04/0.09 = 0.444

b) No, 4% have been to both

c) No, P(Canada) = 18%, which does not equal part (a), above, so not
independent.

Friday HW

Ch. 14 #12, 21
Ch. 15 #8, 10, 15, 24

Start of 15

Ch. 15 #2, 4, 20

Chapter 15

We started chapter 15, but no homework yet.
Get those app's done tonight!!!

Tuesday HW

Ch. 3 #14
Ch. 14 #19, 20, 24, 25

Back from break!

Page 110 #24
Ch. 14 #11 and 14

The last 4 days before Thanksgiving

Tuesday:  Unit 3 Review, #23, 24, 29;  Article #6

Wednesday:  Crossword and flipbook

Thursday:  Test on Unit 3 (1 page multiple choice + normal, 2 experiments, 1 survey)

Friday:  Bias project: poster and presentation

down the river

We started a stratifying activity today. Make sure you find all four
means. We'll wrap it up tomorrow.

HW: Ch. 13 #9-15, 32, 34, 36; Ch. 12 #7, 9--Due Friday!

More design

HW: Ch. 13 #3-5, 28-30

More experiments

Read about observational studies: pages 246-247
Do: Ch. 13 #1, 2, 6, 26

See you Monday!

Work for Thursday night and Friday:
Ch. 13 #19-24

Article #5

Article #5 is due Thursday

Monday Homework

Ch. 12 #15, 16, 23, 24

Here are some of the class notes:

Calling on students for chance cards.

Simple Random Sample:
Use the Random Integer command on my calculator to randomly pick who to call on.
OR:
Put everyone's name in a hat and draw 5 names.

Stratified Random Sample:
I might stratify by class grades. Divide the class into five groups
(A, B, C, D, F) and randomly pick some students to participate from
each group. I think students with high grades are more likely to
participate and vice versa, so this will give me a good
representation.

Cluster sample:
Randomly pick one of the 8 table groups and call on everyone in that group.

Systematic Random Sample:
Use the roll sheet and pick every 5th person.
OR:
Pick every 3rd person as you arrive to class.

Population: Rancho Students
Question: Is RCHS a quality school?
Possible Strata?

Stratifying by GPA:
I would divide the student body into 3 groups: high, med and low GPA.
I would then randomly choose some students to survey from each group.
I think that each of these groups will have very different opinions
about RCHS and I want to make sure that each group is represented.

More chapter 12...

#8, 10, 12, 14

HOW do you collect that data?

Ch. 12 #2, 4, 6

Test tomorrow!

Test on regression tomorrow:

Study chapters 7 through 10 and normal problems
Study your worksheet from Chapter 10
Study your old regression test on temp/crawling
Study Ch. 9 #1
Study extrapolation, outliers and influential points and the standard
deviation of the residuals
Chapter 10 #1 and 2

End of regression, really!

Page 204 #2, 4 and for #28 please interpret s in context.

2 days

Thursday we did a worksheet and Article #4
Friday: Page 207 #17, 37, 40

Onward in 10

We did Chapter 9 #1 in class, and so should you.
HW: Ch. 10 #1, 2, 7

Starting Chapter 10

1978—63,042
1979—226,260
1980—907,075
1981—2,826,095
Year vs. acres devastated by the gypsy moth.
Predict for 1982, please!

Also, MC packet #6

Influential?

Wandering point worksheet
Ch. 9 #11-16
Article #4 due Friday--just write a half-page summary

Review Answers

Well, you lazy bums. I suppose you're too busy on MySpace to e-mail me any answers, so here's a few:

17c) First take the squareroot of 0.924. I forget exactly what this is, but it is 0.9something. This tells us there is a strong, positive, linear relationship between tar and nicotine.

17d) For every 1 more mg of tar, we predict about 0.065 more mg of nicotine.

17e) Even with no tar, we still predict about 0.154 mg of nicotine.

1d) 92.3% of the variation in age can be explained by the regression on age.

1f) She is shorter than predicted, for her age.

1g) Wait until next week.

See you in the morning!
Now go to bed! :o)

Before the test

Finish the crossword and finish your flipbook.

Practice Test

Ch. 8 #10, 32, 36
Add to #10 the interpretation of the y-intercept
Parts of this assignment will graded tomorrow
and this grade will be part of your test grade.

End of chapter 8

HW: Ch. 8 #8abc, 21, 23, 25d

Thursdays HW

Ch. 8:
#25ef, 29c
#30: slope, y-intercept, r, R2, and prediction for 2002
Article #3!!!

No homework for Friday

R^2

HW Ch. 8:
#25bg, 29abd
For #29 find the residual for (250, 95).
Is this data point above or below the LSRL?

Chapter 8

HW: 
Ch. 8 #25ac + find the residual (19, 410)
Ch. 8 #28acd

Scatterplots

HW: Ch. 7 #4, 6, 8
If you didn't get c, d and e right on the test, you need to also do:
Ch. 6 #28

Test tomorrow!

Here is a nice answer from the practice test from chapter 3 about smoking and education level:

The data suggest that a higher percentage of non-smokers continue their education beyond High School than smokers.
Non-smokers have a higher percentage of 4-year college attendees (48%) than smokers (26%). Less of non-smokers have only High School educations (40%) than smokers (64%). Therefore, smoking habits are associated with education level and these variables are NOT independent.


Here is my answer from the CUSS'ing quiz about Halloween candy:

Note to self: since one data set is skewed, I will use the median and IQR:

The boys collected more candy than girls with a median of 62 compared to 45.5.
The boys were skewed left whereas the girls are fairly symmetrical.
(note: no comparison word really needed)
The boys have slightly more spread than the girls. The boys have an
IQR of 31 and a range of 65, while the girls have an IQR of 25 and a
range of 60.

Homecoming

Today in class we made a Flip-chart.

If you finish the review by Monday and give me a chance card.

Review assignment starting on page 105

UNIT  I Review problems
# 5, 21(outlier test on c!),
#25-27, 29(a-g + make a box-plot),
#31, 32  
Double stamped:  
once Friday (for starting)
once Tuesday (when you should be DONE)
            Or by Monday for a Chance Card!

ALSO:  Article #2 due Friday
http://www.mrderksen.com/art2.htm

The end of Unit I

Ch. 6: Finish #25, 26, 27

Are you normal?

HW: Ch. 6 #25ab, 26ab

A nice answer from the quiz

Note to self: since one data set is skewed, I will use the median and IQR:

The boys collected more candy than girls with a median of 62 compared to 45.5.

The boys were skewed left whereas the girls are fairly symmetrical.
(note: no comparison word really needed)

The boys have slightly more spread than the girls. The boys have an
IQR of 31 and a range of 65, while the girls have an IQR of 25 and a
range of 60.

Starting Chapter 6

We started chapter 6.
We will finish it on Wednesday, so hang on tight.
Test on chapters 1-6 next Wednesday.
Don't forget Article #2 is due Friday.

Classwork: Ch. 6 #5, 6, 11
HW:
Ch. 6 #7 and 15
Ch. 5 #30 (you have the ogive on your handout to write on)

Ogives!

Today we did a worksheet on ogives. You can/should do #29 in Chapter
5 to see what you missed.

It looks like our schedule for next week is this:
Mon-Wed: Work very hard and focused and do Chapter 6
Thur-Fri: Review
Mon: Review
Tues or Wed: Test on Unit 1: Chapters 1-6

Last homework for the week

Ch. 5 #5b, 6, 22

Fun web site o' the day:
http://www.stat.tamu.edu/~west/ph/stddev.html

Put that calculator to work!

HW: Ch. 5 #5a, 14, 21, 26, 36, 41

Website from today:
http://www.mathsnet.net/asa2/modules/shodor/plop/

Outlier Rule

HW: Parent Signature and Ch. 5 #23b

Here comes chapter 5

HW: Ch. 2 #8; Ch. 5 #23cd, #35b + boxplot

Tutoring this week: Wed and Thur, 2:30 - 3:15

Last Friday we discussed Ch. 4 #14. We COMPARED the shape, centers
and spreads of the two distributions.

Most Important Stuff in Chapter 4

In class we made a histogram and a calculator for #18
HW: Ch. 4 #8, 12, 17, 24 + Article #1 summary from the web

No Homework

No HW.
In class we learned how use Stat Edit (page 11) and Stat Plot (page
43) and we did this with the hair length data from each class.

Week 2!

In class we took notes from the Workshop Stats Book.

HW: Ch. 4 #3,5; Read your syllabus and Chapter 1
Quiz on Tuesday on syllabus and chapter 1

Friday, Aug. 30th

We did a worksheet in class that was a practice test for Chapters 2 & 3.

Chapter 3, Day 2

Today in class we discussed independence. We analyzed some of our
class data and we did #21.

Homework: Ch. 3 #15, 16, 18
Die is due on Tuesday
Syllabus and chapter 1 quiz on Wednesday

Chapter 3 begins

Homework:
Ch. 2 #7
Ch. 3 #6 & 8

Day 2!

Today we read the information on Page 8 and did problems 2 and 3 in Chapter 2.

HW: Chapter 2 #4-6

Monday, August 27th

First Day of School:

Due tomorrow: One dot-plot of the M&M data (pick any color or the
total) and 2 sentences describing your dotplot.

Due the Tuesday after Labor Day: 1 homemade die. The cube must be
homemade. 4 pts. for durability, 4 pts. for artistic/creativity, 4
pts. for punctuality.

Stuff to consider: Bring in Kleenex, start bringing your calculator,
read your syllabus.

Thanks for a great first day!

Summer "Homework"

If you're reading this you're either bored or you're a conscientious student who wanted to make sure you aren't skipping something important or you're a major procrastinator who is reading this on August 26th. In any case, I asked to do to two simple things this summer:

1) Make sure you have a graphing calculator for fall

and

2) Think about how ridiculous the weather man is: he tells you what the average high temperature is for today and then he tells you today's high, but he doesn't really tell you whether today is unusual or not. How would you know? How could you tell someone whether today is unusually hot or cold?

Project instructions

II. Data Report (20 points)
Due Wed, May 30
This section should be a thorough explanation of how you collected your data and be a beautiful example of how much you've learned this year about the difficulties getting a representative sample.  Examples of what you should include are:

• How you collected your data
• Why you are confident your sample matches your population
• Biases avoided and not avoided
• A copy of any survey that was filled out
• Your data:  either in "Excel" format or in a table/matrix summary.  You need at least 75 people/subjects for each group you want to compare.  Your data should be broken up by any category you want to compare.

III. Exploring the Data (25 points)
Due Fri, June 1

• This section should be an outstanding example of exploratory data analysis (the first unit in our text).  Graphs should show the comparisons between all relevant groups you are comparing.  You should state any preliminary conclusions that can be drawn by using your eyeballs.
• Graphs of your data
• Statistics from your data
• Descriptions of the graphs and statistics.

IV. Analyzing the Data (25 points)
Due Fri, June 1
Analyze your data using whatever method(s) is appropriate for your data.  Your conclusion should be nicely written using all appropriate statistical support.  Remember that confidence intervals can be a powerful method for comparing different groups.

• Hypothesis Test (with conditions checked) and/or
• Confidence Intervals (with conditions checked) and/or
• Regression
• Your Grand Conclusion!

V. Presentation (20 points)
2nd and 5th: Tuesday, June 12th
4th:  Friday, June 1st
Must include:

• Clearly communicate your question and how you collected your data. (5 pts.)
• Visually communication of some sort—you choose the method. (5pts.)
• Clearly communicate your conclusion (5 pts.).
• Be interesting to listen to and give us some sort of "hook" to inspire us to listen (5 pts).
• Do not read off your visual aid—use note cards or your report.  Be careful how you communicate numbers to the class—too many numbers at once is confusing, as is too many decimal places.

VI. Success!? (15 points)
I will evaluate the overall success and difficulty of your project.  More challenging data collection issues add to your score.  Small sample sizes or an overly simple question will lower your score.

Details You Should Know

• Tardies during the project will cost you points.
• NO NO NO NO NO late work is accepted without penalty—even with excused absences.  No late presentations will be scheduled
• Make your own copies anything you turn in.  Once you turn in one part of your report, I need to keep it.
• Don't get lazy—this is to be the summation of what you've learned all year.  
• Please type your paper.  Hand-done work is acceptable for some graphs, etc if it is done very neatly.

Choosing a test

Do this!!!

http://www.ltcconline.net/greenl/java/Statistics/StatsMatch/StatsMatch.htm

Note: the wording on this website is more vague than the AP test. The AP test always asks for "a 95% confidence interval" if it wants an interval (or some other %). Also, the AP problems are longer, and thus have more information that will guide you to deciding what to do.

However, I think that after you 10 or so of these, you'll get used to the wording of this site and it will be good practice. If it is just always frustrating, switch to finding the tests and intervals in your notebook. Every released test (A, B, C,...) has at least one.

Note: this website includes prediction intervals, which you do not
need to know.

Friday

See you this afternoon!

CW: Inverse Normal: '97 MC #12, '02 MC #10
Experiment vs Randomization: G-3a, M-3a, I-4a

Thursday

H-2

Wednesday

No official homework tonight. I trust you're motivated to do some
studying on your own. The link below this post would make for some
great practice tonight.

Choosing a test

Here is a website you can use to practice choosing which procedure to
use for a given problem:

http://www.ltcconline.net/greenl/java/Statistics/StatsMatch/StatsMatch.htm

Note: this website includes prediction intervals, which you do not
need to know.

Tuesday

Pick 3 of the previous night's HW and do them (green sheets)
Also do: MC '97 #2, 5, 6, 16, 29

Monday, April 29th

HW: Make a review sheet for all of inference. Use the back of your book!
Also: NAME IT: E-5, G-4, I-3, K-4, L-4

Green sheet quiz first thing tomorrow! Last quiz of the year!!!!

Read this!

NOTE:  Read both of the two posts below if you were absent at the end of the week.  One post is about classwork and the other about homework!

End of Star testing week

In class on Thursday and Friday we:
**Did I-5 (Goodness of fit)
**MC 02 #11 and 19
**C-2
**And finally, a chi-square quiz.   Note!  This quiz is worth double!  It is both for your final and your first (and last) chi-square test!

Thursday and Friday

Due Monday:

A-5, B-5, F-6

This is about prop-z-stuff and mean-t-stuff

Name

Conditions

Formula and calculator output

Conclusion

Forgot something?  Look it up on an old Green Sheet!

Monday April 23rd

E-3, F-3, H-3, N-3

Thursday and Friday

HW: 
Ch. 16 #15 & 25
Ch. 17 #13
Ch. 18 #9, 21
J-3, K-3

Wednesday

MC-B
Ch. 6 #25
Ch. 11 #11
Ch. 14 #13
Ch. 15 #7, 9

Tuesday

Multiple-Choice-A
MC-A
All 14

In class:  L-5

Monday, April 16th

In class we went over H-4 and some design practice with blocking and confounding.
HW:  E4, F2, G3, I4

Friday

HW: 
Ch. 12 #11 & 15
Ch. 13 #29 & 33

Thursday

CW:  G-1 and a quiz
HW:  M-5, C-3, K-1

Wednesday

We did C-1 and a quiz in class and went over the MC answers.  No HW.

Tuesday

HW:  Ch. 27 #2--add a 95% CI to the problem
Also Y-1 #16-31

Monday, April 9

HW: 
Ch. 8 #9, #35
B-4
A-6
Ch. 4 #9 &11--find the median by hand:  that's it!

Friday

Today we did M-1 and went over homework.

Thursday

A-1 and A-4
Ch. 26 #12 &13

Wednesday

First Final Exam Quiz of the year tomorrow!
HW:  Ch. 26 #6, Y-1 #11-15, E-1

Tuesday

Ch. 26 #2 & 8
Y-1 #6-10
D-3

Monday, April 2

HW:  Chapter 5 #13, 23, 31
Y-1 #1-5 (in your review notebook)

Wednesday

For these problems, please NAME the interval/test needed for each.  You need not do the problem.

Page 510 and following:  #5-10, 13, 19, 27

Test Friday!

Tuesday

Test Friday!!!

HW:  Ch. 22 #14, Ch. 24 #21, Article #12

Monday, March 19th

Ch. 24 #6 & 9
Ch. 22 #3 & 9

Friday (and Thursday)

We started (and finished!?) Chapter 24
Do a test and an interval for #7

Test on Wednesday, March 14th

Test on Chapters 23 and 25
1-mean t-intervals and t-tests
Data is one variable or matched pairs

Study: 
Errors and Power (Ch. 23 #17 & 19)
CLT
Ch. 25 #14ab
Ch. 23 #21 and 23
Ch. 19 #7
The fill-in-the-blank worksheet about t
The worksheet that compares alpha/tests with intervals/level

Monday, March 12th

In class we did a worksheet that tied intervals and hypothesis tests together.  We also did a green sheet for Ch. 25 #19 comparing the difference to 45 feet.

HW:  Ch. 25 #14abc, #19

Thursday & Friday

Ch. 23 #18, 28
Ch. 25 #11, 12
Add a 95% confidence interval to #12
Article #11 due Friday

Note:  We are going to have a test next Wednesday and another test the week after that!  Hang on tight and come to school Monday ready to roll!  Also note that 2nd period will make-up their missed time during SSR.

See you Monday!

Tuesday

Ch. 23 # 11, 20, 25 and 26

In class we did #9 and 21

Monday, March 5th

3 weeks until Spring Break!
Goal for the next 3 weeks:  Do everything through chapter 25!
Goal for this week:  Finish chapter 23 and start on chapter 25

Tutoring on Tuesday
Sub on Thursday
Rally on Friday


HW:  Ch. 23 # 23, 24 and #8

Thursday & Friday

Thursday:  Test
Friday:  Assignment from Workshop Statistics

Make-up test:  Tuesday AFTER SCHOOL.

Wednesday

To study for the test:
1-prop z-interval (Ch. 19 #21)
**Check conditions
**Write formula (but use calculator)
**Interpret interval
**Interpret level

1-prop z-test (Ch. 20 #15)
**The whole green sheet
**2 sentence conclusion
**Interpret p-value

Changing n and z* (Ch. 19 #7)

Calculate sample size (Ch. 19 #25a)
Don't forget to round up!

Explaining Errors and Power (Ch. 21 #7 & 9a)

Sampling Distribution (pink test)

Changing alpha, n and the true answer
(Ch. 21 #9bcd and #3)

Connecting intervals and tests
**Is po in the interval?
**What does that tell us?

Tuesday

Do one perfect confidence interval and one perfect green sheet (hypothesis test).

Monday, Feb 26th

HW: Ch. 21 #8, 10, 13-16.
15 and 16 should be on a split green sheet.

Friday

Ch. 21 #7 and 11abcd

Thursday

Group test. If you missed it, you'll have to take your individual score instead.

Wednesday

Ch. 20 #8
Ch. 20 #21 on a green sheet (no CI needed).

Tuesday, Feb 20th

CW:  Ch. 20 #12
HW:  Ch. 20 #11, 19
Mega-quiz on Friday!

Thursday

IMPORTANT Classwork: Ch. 20 #1, 7, 16
Homework: Ch. 20 #17
If you have been absent Wed. or Thur., you need the CW and HW to get a 4 on your stamp sheet. Thanks!

Wednesday

Today we started our last big topic of the year.
CW:  Ch. 20 #10
HW:  Ch. 20 #9

Tuesday, Feb 13th

Well folks, here's the end of Ch. 19:  #8, 23 and 25.
Make sure and show me some work on #23 and 25!!!

FRIDAY!!!

Today we learned how to put a frequency table into our calculator.  (two lists).
Then we learned that you can graph it and find all the stats.  This is a handy tech tip that is not required, but might come in handy for the AP test.  Especially in Chapter 16, where the expected value and standard deviation formulas can take lots of calculator work, this tech tip can be useful. 

There will be an extra credit question on our next test regarding this topic.

If you want to read about this TI-Tech Tip go to:

**Page 43, last paragraph
**Page 68, last paragraph
**Page 313, the whole Tip

Thursday

Ch. 19 #4, 14, 18
Are you checking conditions?
Are you showing the formula AND using your calculator?

Wednesday

Ch. 19 #17

Tuesday, Feb. 6th

We had a test on Monday.  I know, it was hard.  Ch. 18 always is.  The vocabulary of the questions is killer.  The good news is:  you just took the hardest test of semester 2.  It all gets easier from here.  We start Chapter 19 on Wednesday.

Tuesday classwork/homework:  Ch. 4 #9, Ch. 5 #23, 25, 28
CUSS'ing practice!
Quiz on these problems, first thing Wednesday!

Test on Monday...

Study your:
**Ch. 17 Quiz
**Ch. 18 #9
**Ch. 18 #27
Be able to state the CLT.

See you soon!

Error

There are now two posts that say "Wednesday".  22, 24 and 28 and the article is for Thursday, due Friday.

Thursday--a little help

22a)  13.7%
22b)  31.9"
22c)  What's shape?  ______
What's the mean?  _____
What's the sd? ______ (hint:  something divided by the square root of something)
22d)  0.005

24a)  skewed right--you can't stay for less than zero and a few people will stay a long time.
24b)  The CLT will guarantee normality for large sample sizes.  For individuals, we don't have a clue how to calculate probabilities for skewed distributions.

28a)  4.78%
28b)  (1 - 0.0478)^3 = 0.863
28c)  Like 22c above...
28d)  Basically zero

Wednesday homework

Ch. 18 #22, 24, 28 + Article #9

Read below for a little help with these evens!

Wednesday

Article due Friday!!
Test Monday!!
HW:  Ch. 18 #20

If you are trying to get your brain around what the CLT says, there is a link on my website to "Sampling Distributions".  Take a look. 

Tuesday

Ch. 18 #12 and #13.  The answer to #12 is 8.1%.

Monday, Jan. 29th

Finish the binomial quiz
Ch. 18 #2, 4, 6, 10

Wednesday

HW:  Ch. 17 #8a, 10, 18

Tuesday

CW:  We did the simulation on #6 and used our calculator to make a random variable table (0-5).  We then found the mean and sd of the problem.  Then #15ab

HW:  Ch. 17 #7, 12, 14, 16ab

January 22--First Day of Second semester!!

We did Ch. 17 #14d.
We learned how to get the answer on our calculator.
How to write out the formula the calculator uses.
What the formula means.

HW:  Ch. 17 #13

Final exam tips

Unit 1:
Study the outlier rule, cussing and the obstacle course problem

Unit 2:
Study the taxi and postal rate problem, Ch. 8 #35 and Ch. 10 #1.

Unit 3:
Read all the vocab at the end of 12 and 13 and study your tri-color test.

Unit 4:
Study #1-8 on the green/white test, the prob. scrambles and the Unit IV review.

Part 5:
Normalcdfs (chapter 6) and simulations (chapter 11)

Work hard.  Form a study group.  See you soon!

Tuesday

Last homework of the semester!!!!!
(other than hours of grueling work studying for your final...)

Ch. 11 #15
Ch. 17 #14a and #14d

Monday, Jan 8th

CW:  Chapter 11 #11
HW:  Chapter 11 #19 and Chapter 17 #13a

Info about the final exam will be posted soon.