Monday: 10-Noon

Tuesday: 10-Noon

Wednesday: 10-Noon

Friday: 10-Noon

Or by appointment

There will be a review on Tuesday, May 4th at 8:00 PM in 165 Nick.

Chapter 2 (Page 117)

13, 21-24, 25, 29, 37-40

Chapter 5 (Page 297)

23, 24, 33-36, 39-45 odd

Chapter 6 (page 353)

1 (mean=103.5, sd = 34.7), 3, 5, 17, 19, 21, 31, 33, 39

Chapter 7 (page 427)

7, 9, 19, 22, 20, 21, 45

Chapter 8 (page 481)

7 and 8

Chapter 9

final_review.pdf

final_review_answers.pdf

Chapter 2

22. Right skewed

24. Mean

38. 68 inches

Chapter 5

34. 53.7

36. 47.89 meters

regression_hw.pdf

anova_homework.pdf

Question 1

Ho: mu1=mu2=mu3

Ha: At least one pair not different.

There is not enough evidence (F= 2.14,p=0.156) to suggest a difference among the average prices of the battery types.

df ss ms F

Size 2 513.42 256.71 2.14

Error 13 1554.33 119.56

Total 15 2067.75

Question 5

Different: Blue-Green,Blue-Yellow, Green-White, Green-Yellow, White-Yellow

Same: Blue-White

Here is the line plot:

Yellow 47.2

Green 31.2

White 16.2 |

Blue 14.8 |

Hand-in EVEN questions only

Section 8.1, Page 445

19-24

Note: Use the p-value approach described in class, not the critical value approach described in the paragraph on page 445. Be sure to write your conclusion in the context of the problem.

Section 7.2 (page 389)

37 (mean=14.9, standard deviation = 4.3), 39, 40

Section 7.4 (page 411)

Conduct these tests like I described using a p-value (not the critical region like suggested in the book).

9,10,11, and 12

And questions 2 and 3 from this handout:

ztest_ci_worksheet.pdf

9:30-11:30 in Nick 170

Section 2

12:00-2:00 in Nick 168

Chapter 5 (page 297)

39-45 odd

Chapter 6 (page 353)

1 (mean=103.5, sd = 34.7), 3, 5, 17, 19, 21, 31, 33, 39

Chapter 7

7, 9, 19, 22

Two sample proportion problem:

Among children under the age of 7, 134 out of 548 tested positive for the H1N1 virus in a large school district. For children between the ages of 7 and 12, 28.4% out of 750 tested positive for H1N1. Construct the 95% confidence interval for the difference in percent infections between children under the age of 7 and 7 or older.

Two sample mean problem:

Two groups of laboratory rats are raised in different size cages. Group A rats were raised in cages four times as large as the rats in Group B. Based on the data below, use a 90% to determine if there is a difference in the body weights. Be sure to interpret your confidence interval in the context of the problem.

Group A Group B

Mean 418g 392g

Standard Deviation 35g 42g

Sample Size 43 38

ANSWERS

22.

Ho: mu <= 650

Ha: mu > 650

z* = 1.17

p = .121

Fail to reject, there is not enough evidence to suggest that the daily cost is more than $650. We cannot reject the claim.

2 Sample Proportion CI

-.039 +/- .049 = (-.088,.010)

2 Sample Mean CI

26 +/- 14.23 = (11.8,40.2)