Complete the following exercises from "Review Questions" located at the end of each chapter and put them into a Word document to submit to the instructor.

1.Chapter 19, numbers 19.9 and 19.16

2.Chapter 20, numbers 20.5, 20.6, and 20.7

Show all relevant work; use the

equation editor in Microsoft Word when

necessary.1.Chapter 19, numbers 19.9 and 19.16

19.9 Randomly selected records of

140 convicted criminals reveal that their crimes were committed on the

following days of the week:

DAYS WHEN CRIMES WERE COMMITTED

FREQUENCY

MON.

TUE. WED. THU. FRI. SAT. SUN. Total

Observed(fo) 1723221823.2415

40.

140

(a) Using the .01 level of

significance, test the null hypothesis that in the underlying population,

crimes are equally likely to be committed on any day of the week.

(b) Specify the approximate p-value

for this test result.

(c) How might this result be

reported in the literature?

19.16 Test the null hypothesis at

the .01 level of significance that the distribution of blood types for college

students complies with the proportions described in the blood bank bulletin,

namely, .44 for O, .41 for A, .10 for B, and .05 for AB. Now, however, assume

that the results are available for a random sample of only 60 students. T

he results are as follows: 27 for

O, 26 for A, 4 for B, and 3 for AB. NOTE: The expected frequency for AB,

(.05)(60) = 3, is less than 5, the smallest permissible expected frequency.

Create a sufficiently large, expected frequency by combining B and AB blood

types.

2.Chapter

20, numbers 20.5, 20.6, and 20.7

20.5 A group of high-risk

automobile drivers (with three moving violations in one year) are required,

according to random assignment, either to attend a traffic school or to perform

supervised volunteer work. During the subsequent five-year period, these same

drivers were cited for the following number of moving violations:

NUMBER OF MOVING VIOLATIONS

TRAFFIC

SCHOOL.VOLUNTEER

WORK

026

07

154

91

7 1

014

16

23

10

7

8

(a) Why might the Mann-Whitney U

test be preferred to the t test for these data? (

b) Use U to test the null

hypothesis at the .05 level of significance

(c) Specify the approximate p-value

for this test result.

20.6 A social psychologist wishes

to test the assertion that our attitude toward other people tends to reflect

our perception of their attitude toward us. A randomly selected member of each

of 12 couples who live together is told (in private) that his or her partner

has rated that person at the high end of a 0 to 100 scale of trustworthiness.

The other member is told (also in private) that his or her partner has rated

that person at the low end of the trustworthiness scale. Each person is then

asked to estimate, in turn, the trustworthiness of his or her partner, yielding

the following results. (According to the original assertion, the people in the

trustworthy condition should give higher ratings than should their partners in

the untrustworthy condition.)

TRUSTWORTHINESS RATINGS

COUPLE.TRUSTWORTHY

(1)UNTRUSTWORTHY

A75

60

B.35 30

C50 55

D93 20

E74 12

F

47 34

G95 22

H63 63

I

44 43

J8879

K5633

L8672

(a) Use T to test the null

hypothesis at the .01 level.

(b) Specify the approximate p-value

for this test result.

20.7 Does background music

influence the scores of college students on a reading comprehension test? Sets

of 10 randomly selected students take a reading comprehension test with rock,

country-western, or classical music in the background.

The results are as follows (higher

scores reflect better comprehension)

READING COMPREHENSION SCORES.

20.7 Does background music influence the scores of college students on a reading comprehension test? Sets of 10 randomly selected students take a reading comprehension test with Rock country-western, or classical music in the background.

The results are as follows (higher scores reflect better comprehension)READING COMPREHENSION SCORES

ROCK (1).COUNTRY-WESTERN (2)CLASSICAL (3)

909952

119475

829591

672394

987297

938131

737983

902885

8794100

847769

(a) Why might the H test be preferred to the F test for these data?

(b) Use H to test the null hypothesis at the .05 level of significance