Learning check, Chi-square

1. In a chi-square test, the variables are

a. rank-order (ordinal).
b. ratio-scale.
c. continuous (quantitative).
d. categorical (nominal).

2. The degrees of freedom for the chi-square test for independence is

a. the number of categories minus one.
b. the number of columns minus one, times the number of rows minus one.
c. the total number of category levels minus one.
d. the number of subjects minus the number of cells.

3. Chi-square distributions are __________ skewed.

4. The chi-square test for __________ lets you test how well an observed frequency distribution over categories fits some expected pattern.

Answers below

Answers, Chi-square learning check

1. d
2. b
3. positively
4. goodness of fit