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A researcher is studying the effects of the college experience on attitudes, values, and behaviors and is comparing random samples of freshmen and seniors at the same university. Which of the following differences are significant? a. Proportion calling parents at least once a day: Freshmen Seniors P s 1 = 0.24 P s 2 = 0.08 N 1 = 153 N 2 = 117 b. Proportion with a “close friend” from another racial or ethnic group: Freshmen Seniors P s 1 = 0.15 P s 2 = 0.26 N 1 = 155 N 2 = 114 c. Proportion saying that they are “very interested” in national politics: Freshmen Seniors P s 1 = 0.46 P s 2 = 0.48 N 1 = 147 N 2 = 111 d. Average score on a scale that measures political ideology. On a scale, 10 means “very conservative” and 1 means “very liberal”. Freshmen Seniors X ¯ 1 = 5.23 X ¯ 2 = 5.12 s 1 = 1.78 s 2 = 1.07 N 1 = 145 N 2 = 105 e. Average score on a scale that measures support for traditional gender roles. This scale ranges from 7 (“Very traditional”) to 1 (“Very non-traditional”) Freshmen Seniors X ¯ 1 = 2.07 X ¯ 2 = 2.17 s 1 = 1.23 s 2 = 0.78 N 1 = 143 N 2 = 111

BuyFind

Essentials Of Statistics

4th Edition
HEALEY + 1 other
Publisher: Cengage Learning,
ISBN: 9781305093836
BuyFind

Essentials Of Statistics

4th Edition
HEALEY + 1 other
Publisher: Cengage Learning,
ISBN: 9781305093836

Solutions

Chapter
Section
Chapter 8, Problem 8.16P
Textbook Problem

A researcher is studying the effects of the college experience on attitudes, values, and behaviors and is comparing random samples of freshmen and seniors at the same university. Which of the following differences are significant?

a. Proportion calling parents at least once a day:

Freshmen Seniors
P s 1 = 0.24 P s 2 = 0.08
N 1 = 153 N 2 = 117

b. Proportion with a “close friend” from another racial or ethnic group:

Freshmen Seniors
P s 1 = 0.15 P s 2 = 0.26
N 1 = 155 N 2 = 114

c. Proportion saying that they are “very interested” in national politics:

Freshmen Seniors
P s 1 = 0.46 P s 2 = 0.48
N 1 = 147 N 2 = 111

d. Average score on a scale that measures political ideology. On a scale, 10 means “very conservative” and 1 means “very liberal”.

Freshmen Seniors
X ¯ 1 = 5.23 X ¯ 2 = 5.12
s 1 = 1.78 s 2 = 1.07
N 1 = 145 N 2 = 105

e. Average score on a scale that measures support for traditional gender roles. This scale ranges from 7 (“Very traditional”) to 1 (“Very non-traditional”)

Freshmen Seniors
X ¯ 1 = 2.07 X ¯ 2 = 2.17
s 1 = 1.23 s 2 = 0.78
N 1 = 143 N 2 = 111

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