A researcher wanted to test the relationship between reaction time and time of d
ID: 3315296 • Letter: A
Question
A researcher wanted to test the relationship between reaction time and time of day. She recruited 30 students and gave them a reaction time test in the morning and then the same test in the afternoon. The results of the test were classified as either "pass" or "fail". She found that in the morning 10 passed and 20 failed, and in the afternoon 15 passed and 15 failed. Can she use a chi square test of independence to see if there is a relationship between test performance and the time of day?
yes, because the chi-square test of independence can be used to determine the significance level
yes, because the chi square test of independence can be used to test deviations between theoretically expected and observed frequencies
no, it would not be appropriate to use a chi square test of independence because there are only two levels of each variable in this example
no, it would not be appropriate to use a chi square test of independence because each subject contributed data to more than one cell
A.yes, because the chi-square test of independence can be used to determine the significance level
B.yes, because the chi square test of independence can be used to test deviations between theoretically expected and observed frequencies
C.no, it would not be appropriate to use a chi square test of independence because there are only two levels of each variable in this example
D.no, it would not be appropriate to use a chi square test of independence because each subject contributed data to more than one cell
Explanation / Answer
Answer : B
yes, because the chi square test of independence can be used to test deviations between theoretically expected and observed frequencies
yes, because the chi square test of independence can be used to test deviations between theoretically expected and observed frequencies
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