Quiz 10 Chi Square

Is one weekday night preferred in the college dining hall? You would expect, by chance, an equal number of students in the dining hall each night. You collect data. Which X2 test is most appropriate? X2 test for independence goodness-of-fit either descriptive alternative, depending on degrees of freedom neither descriptive alternative, you should use a t test

X2 test for independence Chi square test of independence compares observed frequencies to expected frequencies for two or more independent variables. Chi Square goodness-of-fit test compares observed frequencies to expected frequencies for a single independent variable.

In a X2 test of independence between age and personality type, the null hypothesis was rejected. The proper conclusion is age and personality are independent of each other age and personality are related to each other age and personality are measured on different scales and cannot be related with statistics a test of goodness of fit is proper for this problem

age and personality are related to each other

A friend brings you data that can be used to establish the independence of two variables. You run an analysis on the data and find a chi square value smaller than the tabled value. Your analysis supports the idea that the two variables are independent are not independent either of the descriptive alternatives are correct, depending whether the calculated value is significantly smaller than the tabled value

are independent

If a X2 is used as a test of goodness of fit, then it is true that empirical data are used to determine expected frequencies expected frequencies are obtained from a theory marginal totals are used to find expected values all of the descriptive alternatives are correct

expected frequencies are obtained from a theory

In a X2 test of independence between gender and kinds of phobias, the null hypothesis was rejected. The proper conclusion is that gender and phobias are independent of each other gender and phobias are related to each other knowing a person's phobia gives you no clue to his or her gender none of the descriptive alternatives are correct

gender and phobias are related to each other

The null hypothesis for a test of independence is that the two variables are independent related either independent or related, depending on the size of the X2 value either independent or related, depending on the size of the X2 value and the df

independent