Wednesday, December 08, 2010

Probability review

That long list of problems should be done by the end of class tomorrow!

Tuesday, December 07, 2010

Probability review

Probability Review
Unit 4 review, P. 340:
#1-3, 5-7, 9, 12, 15, 16ac, 19, 23, 25-28, 30, 35-37

Monday, December 06, 2010

simulations

Ch. 11 #9

Thursday, December 02, 2010

quiz tomorrow!!

Ch 16 #8, 28, 38
Fix your quiz 2

Tuesday, November 30, 2010

more

Ch. 16 #3, 5

Monday, November 29, 2010

Expected?

Ch. 16 #15, 17

Wednesday, November 17, 2010

Chapter 15, for a bit more

#16, 18, 19, 23
(warning:  I think I assigned slightly different problems in second period.  I'm not sure which 4.  Do either assignment and you'll be fine.)

Tuesday, November 16, 2010

more prob

Ch. 14 #22
Ch. 15 #6, 8, 10

Monday, November 15, 2010

NOT mutually exclusive

Ch. 15 #3 & 4

Sunday, November 14, 2010

WebWork

Please go to:

Artist Online Tests

and enter code:

YCJ8383RER


The site will close at 11pm on Thursday night.  Please plan accordingly. 

Wednesday, November 10, 2010

prob

Yesterday: Ch. 14 #18-20, 24
Today: Quiz and worksheet
Enjoy the weekend!!!

Monday, November 08, 2010

probability time!

Ch. 14 #6, 10, 12a, 14a

Wednesday, November 03, 2010

end of 13

Ch. 13 #30, 33
For #30 describe a completely randomized design AND a block design.

Monday, November 01, 2010

HW

Ch. 12 #18
and
Describe a survey for Victoria Gardens
Goal: Find out if people are going to Christmas shop at VG's or
choose other places.
Population: Inland Empire shoppers
Describe and survey method and possible bias concerns.

Thursday, October 28, 2010

design more

WebWork #7 is due tomorrow
Also: Ch. 13 #26, 28

Wednesday, October 27, 2010

design

Ch. 13 #7, 14

Thursday, October 21, 2010

mini-project

Finish tonight.
Webwork #7 due Monday

Wednesday, October 20, 2010

chapter 12

Question: Is RCHS a quality school?
Pop: students
Describe different sampling methods.
What biases might you worry about?
What type of students would be hard to talk to?

Monday, October 18, 2010

Hi!

Webwork #7 due Friday.
Mini-project due Friday.
Page 106 #6, 8 due Wednesday.

Sunday, October 17, 2010

WebWork #7

Time for some serious reading.  College level stuff folks.  Read and take notes on this study:

Cold-eeze study

This is a 6-page pdf.  Take notes.  Be ready to discuss.

Note: I found this article here.

Thursday, October 14, 2010

end of 10

Page 208 #18 & 40
+ a worksheet

Tuesday, October 12, 2010

re-express

Ch. 10 #5, 7

Wednesday, October 06, 2010

test

Test tomorrow
No homework

Tuesday, October 05, 2010

inverse normal

Ch. 6 #25e, 27c

Monday, October 04, 2010

Regression review

Practice.  Due Tuesday:  Ch. 9 #9-12, 15, 16

Multiple Choice practice, due Wednesday, 8am:
Artist Practice Test
Enter the code:  ENR5111ZBU

Friday, October 01, 2010

Ch. 9

If you want to "play" with a line of best fit, go here.

Thursday, September 30, 2010

end of 8

Quiz today
Chapter 9 pre-read

Wednesday, September 29, 2010

practice, practice

Ch 8 #8abc, 10, 36, 22, 24, 26

Answers you need:
22c:  drug-hat = -4 + 0.82(MJ)

26:  cal-hat = 185.7 + 13.93(fat)

Monday, September 27, 2010

regression practice

Ch. 8 #9, 21, 23

Sunday, September 26, 2010

WebWork #6

What are the variables in this scatterplot?

Now find your own scatterplot in the news.  Either print it or sketch it.  Identify the variables.

Thursday, September 23, 2010

practice

Ch. 8 #18
The answer to (a) is:  GPA-hat = 1.215 + 0.0032(SAT)

Wednesday, September 22, 2010

residual

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

Tuesday, September 21, 2010

slope and y-intercept

Ch. 8 #33acd, 35abce

Monday, September 20, 2010

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.

Friday, September 17, 2010

Play!

Guess my correlation!

Tuesday, September 14, 2010

test2

Tomorrow:  Test on chapter 5 and on Ch. 6 #1-4
AND on normal and chapter 3, if you need it.

Monday, September 13, 2010

practice, practice

To practice the outlier check:  Ch. 5 #23b & 24b
To practice independence:  Ch. 3 #20, 21

Thursday, September 09, 2010

test time!

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

Wednesday, September 08, 2010

review, review

FINISH IT!

Tuesday, September 07, 2010

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!

Monday, September 06, 2010

Webwork

No webwork this week.
Test Friday.

Thursday, September 02, 2010

a bit

Chapter 6 #6

Wednesday, September 01, 2010

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!

Monday, August 30, 2010

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.  

Thursday, August 26, 2010

3-day weekend of stats!

Ch. 5 #33, 34

Tuesday, August 24, 2010

Outlier?

Ch. 5 #23-25

Monday, August 23, 2010

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


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?

Wednesday, August 18, 2010

Describe!

Ch. 4 #8, 9, 11

Monday, August 16, 2010

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?

Friday, August 13, 2010

Segmented Bar

We did Ch. 3 #15 in class.
No homework.

Thursday, August 12, 2010

Pie Charts!

Ch. 2 #8
Ch. 3 #6 & 8
Don't forget to scroll down to Monday to see the WebWork!

Wednesday, August 11, 2010

Day 2

Ch. 2 #4 & 5
Read chapter 1

Monday, August 09, 2010

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.

Friday, April 30, 2010

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

Tuesday, April 27, 2010

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

Friday, April 23, 2010

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.

Thursday, April 22, 2010

more inference

L-6
O-2

Wednesday, April 21, 2010

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

Tuesday, April 20, 2010

Name it!

We discussed C-3.

We named the first 12 tests in your folder.

Monday, April 19, 2010

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

Friday, April 16, 2010

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, April 14, 2010

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

Tuesday, April 13, 2010

Monday: expected value

E-2
I-5
J-4

Monday, April 12, 2010

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

Friday, April 09, 2010

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

Wednesday, April 07, 2010

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

Tuesday, April 06, 2010

More exploring data

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

Don't forget MC #4 tonight also!

Monday, April 05, 2010

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

Friday, April 02, 2010

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, April 01, 2010

Thursday

E-6
I-1

Wednesday, March 31, 2010

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

Tuesday, March 30, 2010

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

Sunday, March 28, 2010

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

Monday, March 15, 2010

tables

Ch. 26 #12

Monday, March 08, 2010

review

P. 512 #13, 19, 27

Thursday, March 04, 2010

2 days

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

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

Tuesday, March 02, 2010

practice, practice

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

Monday, March 01, 2010

matched pairs t-test

Ch. 25 #14:
a) test
b) interval
c) think!

Tuesday, February 23, 2010

T test

Ch. 23 #22, 25

Tuesday, February 16, 2010

review

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

Thursday, February 11, 2010

review

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

Monday, February 08, 2010

Alpha

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

Thursday, February 04, 2010

2-prop

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

Saturday, January 30, 2010

this weekend

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

Thursday, January 28, 2010

2 day

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

Monday, January 25, 2010

Confidence Interval

Quiz tomorrow on chapter 19
Tonight:  Ch. 19 #11
In class:  Ch. 19 #17

Tuesday, January 19, 2010

probability practice

Ch. 18 #28

Friday, January 15, 2010

quiz

Practice quiz today.
Ch. 18 quiz Tuesday

Thursday, January 14, 2010

CLT practice

Ch. 18 #22, 30, 31
In class:  #21cd and 24

Wednesday, January 13, 2010

so far this week

Mon and Tuesday:  Ch. 18 #9-13
Wed:  Ch. 18 #27ab

Friday, January 08, 2010

Thursday

Gosh, I keep posting a day late...
Unit IV review #3, 7, 11a

Thursday, January 07, 2010

Wednesday

Ch. 16 #38-40

Tuesday, January 05, 2010

More binomials

Ch. 17 #13, 18, 20

Monday, January 04, 2010

Binomial

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