Quiz 11: Chi-Square Designs

The sum of the expected frequencies must be equal to…

1. the sum of observed frequencies

2. the df

3. (R-1)(C-1)

4. there is no rule about the sum of expected frequencies

The sum of observed frequencies

To find an odds ratio…

1. divide the number who do by the number who don’t

2. add up the odds and divide by the number of odds

3. divide the odds of event X by the odds of event Y

4. none of the above

Divide the odds of event x by the odds of event y

To know the degrees of freedom for a chi square problem, you must know the number of…

1. subjects

2. categories

3. both subjects and categories

4. standard error

Categories

Suppose you had on a single graph three chi square distributions with degrees of freedom of 1, 5 and 10. Choose a point on the X-axis and draw a vertical line. The distribution that would have the most area to the right of the vertical line would be the one with…

1. 1 df

2. 5 df

3. 10 df

4. They would be the same

10 df

Theoretical frequencies in a test of independence are obtained…

1. by assuming the categories of events are independent

2. from predictions based on theory

3. by assuming the categories of events are related in some way

4. in the same way as in tests of goodness of fit

By assuming the categories of events are independent

The null hypothesis for a test of independence is that the two variables are…

1. independent

2. related

3. contingent

4. Independence Day with Will Smith was a cool movie

Independent

Phi and the odds ratio…

1. are null hypothesis tests

2. rely on theoretical distributions

3. are effect size indexes

4. all of the above

are effect size indexes

In a goodness-of-fit test of a theory, the null hypothesis is that the data are…

1. consistent with the theory

2. not consistent with the theory

3. normally distributed

4. random samples

consistent with the theory

Which two phrases go with rejection of the null hypothesis?

1. independence and adequate theory

2. independence and poor theory

3. dependence and adequate theory

4. dependence and poor theory

dependence and poor theory

The terms "contingency table" or "cross-tab" go with…

1. all chi square tests

2. tests of independence only

3. tests of goodness of fit only

4. one sample t tests

Tests of independence only