Chapter 9

Question 1

What is single-sample?

Answer 1

subset of individuals drawn from larger pop

Question 2

What are examples of single sample?

Answer 2

you may want to know if you and your friends consume more alcohol per week than typical American college students. Educators may want to know how the average reading performance of kindergarteners in a particular school compares to national reading scores

Question 3

Comparison of high school males and females on amount of marijuana smoked during summer vacation. (y/n)

Answer 3

No

Question 4

A sociologist wants to determine how the survival rate for newborns in a small developing country compares to the rate reported by World Health Organization for heavily industrialized countries. (y/n)

Answer 4

Yes

Question 5

You wonder if the proportion of female to male psychology majors at your university is similar to that found in a national survey of university students. (y/n)

Answer 5

yes

Question 6

A researcher wants to determine whether Hispanic and Native American men have similar startle responses when presented with an unexpected stimulus event. (y/n)

Answer 6

No

Question 7

When would you use a left-tailed test?

Answer 7

Less than population parameter, since we are evaluating left end of sampling distribution (lower than critical value)

Question 8

When would you use a right tailed test?

Answer 8

Greater than population parameter (higher than critical value)

Question 9

What is the formula when you know the sample size is n > equal 30

Answer 9

z= x-bar- u / s/ square root n

Question 10

What are the critical values?

Answer 10

cut off rejection regions of the distribution

Question 11

One-tailed test with α = .01, z = -0.67

Answer 11

Fail to reject

Question 12

Two-tailed test with α = .05, z = 2.36

Answer 12

reject

Question 13

One-tailed test with α = .05, P-value of outcome = .035

Answer 13

reject

Question 14

Two-tailed test with α = .01, P-value of outcome = .035

Answer 14

fail to reject