Question 1

Unlike other tests of significance, chi square is based on

Accepted Answer

A)   a bivariate table
B)   means as well as proportions
C)   continuous variables only
D)   ordinal-level variables only A

Question 2

For the chi square test using very large samples, there may be a difference between

Accepted Answer

A)   randomness and independence
B)   expected and calculated frequencies
C)   statistical significance and importance
D)   dependent variables and dependent relationships C

Question 3

The sampling distribution for chi squares is

Accepted Answer

A)   shaped like any other normal curve
B)   not normally distributed
C)   bimodal
D)   all of the above B

Question 4

In contrast to other tests of significance covered in the text, Chi square is

Accepted Answer

A)   nonparametric
B)   parametric
C)   semi-parametric
D)   parametrically symmetrical

Question 5

In the Chi square test, degrees of freedom are

Accepted Answer

A)   N - 1
B)   N1 + N2 - 2
C)   (r + 1) (c + 1) 
D)   (r - 1) (c - 1)

Question 6

In the context of chi square, variables are independent if

Accepted Answer

A)   they are related
B)   cause and effect can be proved
C)   the obtained chi square falls in the critical region
D)   the score of a case on one variable has no effect on the score of the case on the other variable

Question 7

According to the text, there is a "gender gap" in American politics and

Accepted Answer

A)   women are more likely to vote for the Democratic candidate
B)   women are more likely to vote
C)   men are more likely to vote
D)   men are more likely to vote for the Democratic candidate

Question 8

When the null hypothesis in the chi square test for independence is true, there should be

Accepted Answer

A)   large difference between the observed frequencies and the expected frequencies
B)   little difference between the observed frequencies and the expected frequencies
C)   no difference between the observed frequencies and the marginals
D)   no difference between the row and the column marginals

Question 9

If two variables are independent, the cell frequencies will be

Accepted Answer

A)   exactly the same
B)   concentrated in only two of the cells
C)   less than the expected frequencies
D)   determined by random chance

Question 10

In a research study conducted to determine if arrests were related to the socioeconomic class of the offender, the chi square critical score was 9.488 and the chi square test statistic was 12.2. We can conclude that

Accepted Answer

A)   the variables are independent
B)   being in a certain socioeconomic class causes arrests
C)   the variables are dependent
D)   the probability of getting these results by random chance alone is 0.5.

Question 11

If Chi square obtained has a negative value

Accepted Answer

A)   an arithmetic error has been made
B)   a one-tailed test is called for
C)   the row and column variables must be switched
D)   the null hypothesis must be rejected

Question 12

A Chi square test has been conducted to assess the relationship between marital status and church attendance. The obtained Chi square is 23.45 and the critical Chi square is 9.488. What may be concluded?

Accepted Answer

A)   reject the null hypothesis, church attendance and marital status are dependent
B)   reject the null hypothesis, church attendance and marital status are independent
C)   fail to reject the null hypothesis, church attendance and marital status are dependent
D)   fail to reject the null hypothesis, church attendance and marital status are independent

Question 13

A bivariate table in which one variable had three categories and the other variable had four categories would have

Accepted Answer

A)   four cells
B)   six cells
C)   nine cells
D)   twelve cells

Question 14

The value of the chi square test statistic is always

Accepted Answer

A)   zero or a positive number
B)   greater than the number of cells in the bivariate table
C)   equal to or greater than the critical value
D)   greater than the degrees of freedom

Question 15

In the Chi square test for independence, the research hypothesis is

Accepted Answer

A)   always one-tailed
B)   the variables are dependent
C)   the variables are independent
D)   expected frequencies are greater than observed frequencies

Question 16

In the chi square test of hypothesis, the null hypothesis states that the variables are

Accepted Answer

A)   dependent
B)   independent
C)   causally related
D)   non-random

Question 17

In a 2x2 table, all cell frequencies are exactly the same. This is consistent with which of the following conditions?

Accepted Answer

A)   the variables are both continuous
B)   the sample is a cluster sample
C)   the variables are independent
D)   the variables are dependent

Question 18

Unlike other tests of significance, Chi square easily handles situations in which

Accepted Answer

A)   the variables of interest have more than two categories or scores
B)   the variables of interest have less than two categories or scores
C)   variables are all ordinal in level of measurement
D)   degrees of freedom exceed 100

Question 19

In the Chi square test for independence, the null hypothesis and the research hypothesis

Accepted Answer

A)   always contradict each other
B)   always agree with each other
C)   are never actually stated
D)   are usually both rejected

Question 20

An obtained chi square of 10.78 has been calculated. Critical Chi square is 3.841. What should be concluded?

Accepted Answer

A)   nothing -- information is incomplete
B)   reject the null hypothesis, the variables are not independent
C)   reject the null hypothesis, the variables are independent
D)   fail to reject the null hypothesis

Exam 10: Hypothesis Testing Iv Chi Square