residual

Ch. 8 #25g, 33e, 35d

slope and y-intercept

Ch. 8 #33acd, 35abce

slope and y-intercept

Ch. 8 #25acef

WebWork #5

Multiple choice practice!

Go to:  Artist Test Site
and put in this code:  PSA5586SOA  (use copy, paste).
Type your first and last name.  I will be emailed the results.

Play!

Guess my correlation!

http://istics.net/stat/Correlations/

test2

Tomorrow:  Test on chapter 5 and on Ch. 6 #1-4

AND on normal and chapter 3, if you need it.

practice, practice

To practice the outlier check:  Ch. 5 #23b & 24b

To practice independence:  Ch. 3 #20, 21

test time!

Test tomorrow!  Study Unit 1.  Chapters 1-6.  Study the review we did the past 2 days.  Good luck!

review, review

FINISH IT!

review for test 1

P. 105 #3, 8abc, 10, 21, 25abcd, 26, 27, 33

Do five of these by Wednesday and the rest by Thursday.

Test Friday!

Webwork

No webwork this week.

Test Friday.

a bit

Chapter 6 #6

Sub!

There was a sub today.

I had jury duty.

I'll post the work from the sub tomorrow.

And I'll be back tomorrow!

O-JIVE

Worksheet:  #30 and 1.20

Ch. 5 #27, 30, 41

WebWork#4

Read and summarize the following article.  Pay careful attention to HOW the data was collected.  Make sure to click on the "Read More" so that you can read the whole article.  Read to the end please.

Suffering Adds Up in a Hurry In Survey of Tsunami Survivors

By David Brown

Washington Post Staff Writer

Saturday, January 15, 2005; Page A01

CALANG, Indonesia -- For two days this week, an Australian doctor and his Acehnese assistant knocked on every 10th door in Calang, a seaside town on Sumatra island that was decimated by the Dec. 26 tsunami. At each house, they asked the same brief questions, thanked the residents and departed after about 10 minutes.

What they learned in their bare-bones, random statistical survey, conducted for the International Rescue Committee, was chilling.

Before the tsunami, 8,700 people lived in Calang; now, that number is 2,500, and a third of those are displaced from other towns. Sixty-five percent of households have had a death in the immediate family. Twenty-two percent have taken in orphans, usually more than one. Only 8 percent of the population is younger than 5, and 85 percent of those children have had diarrhea in the past two weeks.

The survey, conducted by Richard Brennan and his assistant, Kamaruddin, has provided the most precise look to date at the tsunami's effects on the people living in the worst-hit part of the worst-hit country.

The survey produced more than numbers, however. It will help the International Rescue Committee, a humanitarian relief agency based in New York, plan how best to spend the $7 million it has budgeted to assist Indonesian survivors of the tsunami.

Relief organizations often use such systematic assessments during man-made disasters involving war, famine and forced dislocation, in which people's needs may not be obvious.  

3-day weekend of stats!

Ch. 5 #33, 34

Outlier?

Ch. 5 #23-25

Bored?

Want to procrastinate instead of do your schoolwork?

My son's videos are a great place to waste some time!  Bob's World of Clay

Boxplots!

Ch. 5 #32, 35, 36

WebWork #3

What Happy People Don’t Do

By RONI CARYN RABIN

Published: November 19, 2008

Happy people spend a lot of time socializing, going to church and reading newspapers — but they don’t spend a lot of time watching television, a new study finds.

That’s what unhappy people do.

Although people who describe themselves as happy enjoy watching television, it turns out to be the single activity they engage in less often than unhappy people, said John Robinson, a professor of sociology at theUniversity of Maryland and the author of the study, which appeared in the journal Social Indicators Research.

While most large studies on happiness have focused on the demographic characteristics of happy people — factors like age and marital status — Dr. Robinson and his colleagues tried to identify what activities happy people engage in. The study relied primarily on the responses of 45,000 Americans collected over 35 years by the University of Chicago’s General Social Survey, and on published “time diary” studies recording the daily activities of participants.

“We looked at 8 to 10 activities that happy people engage in, and for each one, the people who did the activities more — visiting others, going to church, all those things — were more happy,” Dr. Robinson said. “TV was the one activity that showed a negative relationship. Unhappy people did it more, and happy people did it less.”

But the researchers could not tell whether unhappy people watch more television or whether being glued to the set is what makes people unhappy. “I don’t know that turning off the TV will make you more happy,” Dr. Robinson said.

Still, he said, the data show that people who spend the most time watching television are least happy in the long run.

Since the major predictor of how much time is spent watching television is whether someone works or not, Dr. Robinson added, it’s possible that rising unemployment will lead to more TV time.

1. This is a classic example of the difference between association and causation. Explain:

2. Discuss what other variables might be influencing this study.  That is, what might be also associated with TV watching the effects people's happiness?

3. How might a researcher study causation for this scenario? What would make causation difficult to determine?

Describe!

Ch. 4 #8, 9, 11

independent?

Ch. 2 #9

Ch. 3 #16 & 18

WebWork #2

Please read this:  Wired Article

Did you click on "Correlation is not causation" link in the article?  If not, please do so now and read some more.

Write a one paragraph response to this article.  You might use the ideas below to shape your response, but you don't need to.  I want you to tell me what YOU thought about the article on a personal level.

• Are there things you have planned for your future that will require statistical literacy?
• Do you see decisions made at this school that could be improved if we had better data?
• Do you hear things in the news that make you wonder about statistics?
• Do you agree with the author's premise?

Segmented Bar

We did Ch. 3 #15 in class.

No homework.

Pie Charts!

Ch. 2 #8

Ch. 3 #6 & 8

Don't forget to scroll down to Monday to see the WebWork!

Day 2

Ch. 2 #4 & 5

Read chapter 1

First WebWork for the year

This article (click here) is very interesting.  Read it.

Now consider these questions (in your notes/notebook):

1)  Why is the average so high above the typical user?

2)  Cell phone companies have stopped offering unlimited data plans for smart phones.  Explain why the change between 2009 and 2010 makes this a sensible choice.

3)  With ATT, only users who use more than 1000 MB will have to pay more money.  What percentage of customers is this?

4)  Sticking with ATT, users who use less than 200 MB will have their bill cut in half.  What percentage of users is this?

5)  The x-axis is not scaled properly.  Do you think it should be?

6)  In the end, do you think this is good for consumers now?   Explain why you think this might be bad for consumers in the future.

One last chance

Forget about the MC tests? Do this:

First, copy this: QZF9982CNF

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Now
Quiz ends: Monday, 7am

Make-up

This week you can make up MC tests you missed by doing a cumulative practice test. Or two. There are two tests available until 7am on Friday morning:

First, copy this: FFY9568LUK

Or, for a second test: AAU8357GQF

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Monday, 7am
Quiz ends: Friday, 7am

Which test?

This is handy:

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

Warning: the wording is a bit different and there is one test that we haven’t covered. But do about 10 and you’ll get the swing of it.

more inference

L-6
O-2

Flashcards

This might be useful:

Flashcards

inference

C-2

E-5 

G-4

A-4

MC Test 11

First, copy this: HHB1679NXM

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Wednesday, 7am
Quiz ends: Friday, 7am

Name it!

We discussed C-3.

We named the first 12 tests in your folder.

Blocks

E-4

J-2

O-5 (picture)

P-2

L-5

MC Test 10

First, copy this: OBJ2966BPR

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Monday, 7am
Quiz ends: Wednesday, 7am

MC Test 9

First, copy this: JJD2681PZP

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Friday, 7am
Quiz ends: Monday, 7am

Design

F-2
N-5

Wednesday

CLT
B-1
Q-2
Finish '97 MC

Tues/Thursday

I-2 (independence)
E-3 (simulations)
J-3 (practice, practice!)

MC Test 8

First, copy this: PIW3584VOQ

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Wednesday, 7am
Quiz ends: Friday, 7am

Monday: expected value

E-2
I-5
J-4

MC Test 7

First, copy this: APO3142AHN

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Monday, 7am
Quiz ends: Wednesday, 7am

MC Test 6

First, copy this: RRK4924XHW

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Friday, 7am
Quiz ends: Monday, 7am

probability time!

What are the chances?

K-3abcd
O-3

MC test 5

First, copy this: SWE7798WRE

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Wednesday, 7am
Quiz ends: Friday, 7am

More exploring data

In class: L-1 & M-1
HW: H-1

Don't forget MC #4 tonight also!

Prom week!

Today in class we did: J-1 and D-3

Homework: A-1 and E-1

Multiple Choice #4 due Wed 7am:

First, copy this: BRQ3153CJO

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Friday, 7am
Quiz ends: Wednesday, 7am

Weekend

Today in class we did: A-6 and K-1

Homework: Multiple Choice #3:

First, copy this: JYX6475JQV

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Friday, 7am
Quiz ends: Wednesday, 7am

Thursday

E-6
I-1

more regression

In class: MC-A #1-5
We added a test and interval for slope to F-4
HW: M-5, add a slope test to M-5 and C-1

MC Test 2

First, copy this: AJK5381YQH

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Wednesday, 7am
Quiz ends: Friday, 7am

Regression review

In Class: F-4
Tonight: G-1 & online MC practice:

First, copy this: SSL5924XHX

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Monday, 7am
Quiz ends: Wednesday, 7am

Pre test

AP test takers only. You need to take a 40 question pre-test this week to see how ready you are for the AP test.

First, copy this: AJP4325MYQ

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Monday, 7am
Quiz ends: Friday, 7am

The test is 40 questions and once you start you have 1 hour to finish.

OR, if you want, you can take the pre and post test the week before the AP exam. Your choice.

First round of multiple choice

First, copy this: SSL5924XHX

Then click on this link: Artist Practice Test
And answer the questions there.

Quiz starts: Monday, 7am
Quiz ends: Wednesday, 7am

tables

Ch. 26 #12

review

P. 512 #13, 19, 27

2 days

Wednesday (with sub):  Ch. 25 #4, 6, 10, 16

Thursday:  P. 510 #5-10, 13, 16, 19, 27

practice, practice

Ch. 25 #8, 18 + one statcrunch test or interval

matched pairs t-test

Ch. 25 #14:

a) test

b) interval

c) think!

T test

Ch. 23 #22, 25

review

Unit 5 review:  #16, add a test & #21, add an interval

review

Unit 5 Review #5, 9, 17, 29, 30, 31

Alpha

Ch. 21 #10c, 11 bc
Ch. 22 #13

2-prop

In class:  Ch. 22 #9, 11
HW:  Ch. 22 #10, 12

this weekend

Ch. 20 #24:  do the test and also find a 95% confidence interval

2 day

Yesterday:  Ch. 20 #20 and 21

Today:  add a 95% confidence interval to #20 and 21

Confidence Interval

Quiz tomorrow on chapter 19

Tonight:  Ch. 19 #11

In class:  Ch. 19 #17

probability practice

Ch. 18 #28

quiz

Practice quiz today.

Ch. 18 quiz Tuesday

CLT practice

Ch. 18 #22, 30, 31

In class:  #21cd and 24

so far this week

Mon and Tuesday:  Ch. 18 #9-13

Wed:  Ch. 18 #27ab

Thursday

Gosh, I keep posting a day late...

Unit IV review #3, 7, 11a

Wednesday

Ch. 16 #38-40

More binomials

Ch. 17 #13, 18, 20

Binomial

Ch. 17 #11, 12, 15ab
Ack! 11 and 12 are lame. What was I thinking?

Final exam review

Unit 1
Outlier rule
All the graphs
Whether or not resistant
Which stats to use for sym/skewed
Normal
Transformations affecting stats
CUSS'ing

Unit 2
LSRL: r, r^2, slope, y-int
Residuals and residual plots
SOFA
Predictions, extrapolation
Transforming data to make it linear

Unit 3
Survey biases
Survey methods
Experimental methods
Confounding
Simulations

Unit 4
Probability: problems from P. 340

Practice problems
1: Ch. 6 #1
1: P. 106 #8, 10, 11, 21, 25, 27
2: Study your old tests: tire tread, crawling, etc.. Also: Ch. 10 #1
3: Ch. 11 #11, Ch. 12 #19, Ch. 13 #29
Unit 3 worksheets

practice, practice

P. 487 #13:
Make a stem and leaf plot
Make a boxplot
Check for outliers
P. 569 #25
Make a scatterplot
Find the LSRL
Interpret the slope.

Random Variable rules

Ch. 16 #27, 33
P. 106 #8, 10

Expected Value

Ch. 16 #4-6, 17, 18, 20

Expected Value

Ch. 16 #15, 16, 21, 22

probability

Ch. 15 #9, 16, 20
Don't forget:
Bias proposal due Wednesday
Stats articles due each Friday: 
statsarticles.blogspot.com

Friday's final probability problems

We did:  Ch. 15 #3-6

Also, due for 2nd period, by next Wednesday:

Go to: statsarticles.blogspot.com

and read the article on tv and happiness and answer the questions.

today and yesterday

Ch. 14 #13, 17, 19, 21-25

Article

Go to: statsarticles.blogspot.com

And do what it says.

Due Friday.

practice, practice

Unit 3 review #23, 24, 28 and 35
test on thursday and friday

review

I passed out a 3 page review of Unit 3 today.
Due Monday.
Photograph Monday.
The free response problems are worth about 15 minutes of work and should be about one-third to one-half of a page.

experiments!

Ch. 13:
Read the first 2 pages
#1-6

More statcrunch details

Still picking a data set? Go to:
http://rchscrunch.wikispaces.com/
and see what is still available. Be aware! The page numbers may have shifted a bit.
After you pick your data set, edit the page and put your pick on the page!
That's right, it is a wiki: that means you can edit it. Click "Edit", type in your data set to claim it. Then click "Save".

I will be available this Thursday and next Tuesday in a computer lab for help.

Good luck!

chapter 12!

Ch. 12 #6,7, 11, 12
Skip "sampling frame"

last week and today

Last week we did a few more simulations:  Ch. 11 #16 and 13
Tonight:
Describe how you would take a survey to assess the motivation that students have to get a Renaissance shirt. 
How would you collect the data?
What biases would you worry about?
What is the population?

report

Statcrunch exploratory data report

Goal: To show that you understand how to make and describe various
categorical and quantitative graphs and can use those graphs to
discover relationships in a large data set.

Output: A StatCrunch report that is completed and shared/emailed with
me and our RCHS statcrunch group.

Deadlines:

October 26th, Monday: Pick your data set and report it to me.
Note: your data must come from page _____ and can be chosen from the
top/bottom half. Go to Explore—Data to find your page. If that page
does not contain sufficient data, add 35 to your page number.

November 6th, Friday, 7am: Report must be completed, an email sent to
me and shared with RCHS group.

A few details:

*Categorical/quantitative graphs are both required.
*Scatterplots are not required, but are encouraged if they are
appropriate for your data. Likewise with regression equations.
*Your goal is find relationships in the data and describe them. The
most common way to do this is to graph one variable with respect to
another (movie revenue according to rating, pulse rate by gender,
etc…) However, graphs of just a single variable may be important as
well.
*This will count as a test grade.
*I will have a tutoring day in a computer lab for tech fearful!

simulations

Ch. 11 #11

test!

Test tomorrow!
Part I:  Chapter 10
Part II:  Regression and normal

End of homecoming week

Thursday:  Ch. 10 #27; Page 204 #4, 8, 9, 37, 40
Due on Monday
Photograph on Monday

Friday:  Fix test
Monday: Final questions

Tuesday:  Test on:
Ch. 10: transformations
Linear Regression
Normal

worksheet

Today we did a worksheet on transformations.

Ch 10!

Ch. 10 #9 and 10

Review answers

a) Yes! The residual plot shows no pattern
b) 233.5: For each year that goes by we predict about 233.5 more aircraft flying.
c) 89.9% of the variation in aircraft flying is explained by regression on year.
d) Plug in 2 (not 1992!): predicted aircraft = 2939.9+233.5*2 = 3406.9 aircraft.
e) residual at 2 = 40, so the actual was 3406.9+40=3446.9 or 3447
f) sqrt(.899) = .948 = strong, positive, linear relationship between year and aircraft.
g) On average, my predicted number of aircraft misses by about 33.43
h) aircraft-hat = 2939.93 + 233.5(year)
i) we predict in 1990 that the number of aircraft flying is about 2939.9

Study hard! I hope this helps!!!

This week

WASC week!!

Monday:  P. 204 #1,2
Tuesday:  Ch. 9 #2, 4, 13, 14
Wednesday:  Practice for the test.  Regression skills, concepts and normal problems.  + a crossword!