Question 1

When is Pearson correlation typically used to analyze the relationship between two variables?

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Question 2

Summarize the steps involved in computing expected frequencies.

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Question 3

What are the assumptions of the chi-square test?

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Question 4

Application of the chi-square test requires the computation of an ____________________ frequency for each cell of a contingency table under the assumption that the null hypothesis is true.

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Question 5

What are the advantages and disadvantages of applying the chi-square test to quantitative variables?

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Question 6

What is Fisher's Exact Test?

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Question 7

Discuss the sampling distribution of the chi-square statistic and the chi-square distribution.

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Question 8

A common use for the ____________________ test is to test whether frequencies in the population are evenly distributed across the categories under study.

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Question 9

____________________ is a popular alternative to the chi-square test for testing the relationship between two variables in a 2x2 contingency table,when sample sizes are small.

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Question 10

The shape of the chi-square distribution depends on how many ____________________ are associated with it.

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Question 11

Distinguish between the chi-square test of independence and the chi-square test of homogeneity.

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Question 12

How is the strength of the relationship between two variables in a contingency table evaluated?

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Question 13

In chi-square analysis,the sum of the discrepancy scores are combined to create an index known as the ____________________ estatistic.

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Question 14

How is the chi-square test different from previously considered statistical tests?

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Question 15

The chi-square statistic reflects the overall difference between the ____________________ and the expected frequencies.

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Question 16

Power tables can be used to determine the power associated with the chi-square test given the dimensions of the contingency table,the alpha level,the sample size,and the value of ____________________ statistic in the population.

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Question 17

Why is it necessary to conduct follow-up tests in a chi square analysis in order to determine the nature of the relationship?

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Question 18

When the marginal frequencies are random for one variable and fixed for the other,the analytical procedure is referred to as the ____________________.

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Question 19

Discuss the concept of expected frequencies.

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Question 20

If computed for all possible random samples of a given size,a sampling distribution of the chi-square statistic will closely approximate the theoretical distribution known as the ____________________ distribution.

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Quiz 15: Chi-Square Test