A researcher is using a chi-square test to determine whether people have any preferences among three brands of televisions. The null hypothesis for this test would state that ______.
a. there are real preferences in the population
b. one-third of the sample prefers each brand
c. one-third of the population prefers each brand
d. in the population, one brand is preferred over the other two
Question 2
For a fixed level of significance, how is the critical value for chi-square related to degrees of freedom?
a. The critical value increases as df increases.
b. The critical value decreases as df increases.
c. The critical value increases as sample size increases.
d. The critical value decreases as sample size increases.
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