# Project #32094 - Statistics

Complete the following exercises from "Questions and Problems" located at the end of the chapter and put them into a Word document to be submitted as directed by the instructor.

1.    Chapter 17 # 17, 20, 24, 26, 29

CHAPTER 17

(17). A study was conducted to determine whether big-city

and small-town dwellers differed in their helpfulness

to strangers. In this study, the investigators rang the

doorbells of strangers living in New York City or

small towns in the vicinity. They explained they had

misplaced the address of a friend living in the neighborhood

and asked to use the phone. The following

data show the number of individuals who admitted

or did not admit the strangers (the investigators) into

their homes:

strangers into

their home

strangers into

their home

Big-city

dweller

60 90

150

Small-town

dweller

70 30

100

130 120 250

Do big-city dwellers differ in their helpfulness to

strangers? Use _ _ 0.05 in making your decision.

Social

(20). A researcher believes that individuals in different

occupations will show differences in their ability

to be hypnotized. Six lawyers, six physicians, and

six professional dancers are randomly selected for

the experiment. A test of hypnotic susceptibility

is administered to each. The results are shown in

the next column. The higher the score, the higher

the hypnotizability. Assume the data violate the

assumptions required for use of the F test, but are

at least of ordinal scaling. Using _ _ 0.05, what is

Condition 1

Lawyers

Condition 2

Physicians

Condition 3

Dancers

26 14 30

17 19 21

27 28 35

32 22 29

20 25 37

25 15 34

Cognitive, social

(24). A psychologist investigates the hypothesis that birth

order affects assertiveness. Her subjects are 20 young

adults between 20 and 25 years of age. There are

seven first-born, six second-born, and seven third born

subjects. Each subject is given an assertiveness

test, with the following results. High scores indicate

greater assertiveness. Assume the data are so far from

normally distributed that the F test can’t be used, but

the data are at least of ordinal scaling. Use _ _ 0.01

to evaluate the data. What is your conclusion?

Condition 1

First-Born

Condition 2

Second-Born

Condition 3

Third-Born

18 18 7

8 12 19

4 3 2

21 24 30

28 22 18

32 1 5

10 14

Social

(26). A major oil company conducts an experiment to

assess whether a fi lm designed to tell the truth

about, and also promote more favorable attitudes

toward, large oil companies really does result in

more favorable attitudes. Twelve individuals are

run in a replicated measures design. In the “Before”

condition, each subject fills out a questionnaire designed

to assess attitudes toward large oil companies.

In the “After” condition, the subjects see the

fi lm, after which they fill out the questionnaire.

The following scores were obtained. High scores

indicate more favorable attitudes toward large oil

companies.

Before After

43 45

48 60

25 22

24 33

15 7

18 22

35 41

28 21

41 55

28 33

34 44

12 23

Analyze the data using the Wilcoxon signed ranks

test with _ _ 0.051 tail. What do you conclude? I/O

(29). A social scientist believes that university theology

professors are more conservative in political

orientation than their colleagues in psychology.

A random sample of 8 professors from the theology

department and 12 professors from the

psychology department at a local university are

given a 50-point questionnaire that measures the

degree of political conservatism. The following

scores were obtained. Higher scores indicate greater

conservatism.

a. What is the alternative hypothesis? In this case,

assume a nondirectional hypothesis is appropriate

because there are insufficient theoretical

and empirical bases to warrant a directional

hypothesis.

b. What is the null hypothesis?

c. What is your conclusion? Use the Mann–Whitney

U test and _ _ 0.052 tail.

Theology

Professors

Psychology

Professors

36 13

42 25

22 40

48 29

31 10

35 26

47 43

38 17

12

32

27

32

social

 Subject Mathematics Due By (Pacific Time) 06/02/2014 12:00 am
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