A random sample of 1000 registered voters in a certain county is selected, and each voter is categorized with respect to both educational level (four categories) and preferred candidate in an upcoming election for county supervisor (five possibilities). The hypothesis of interest is that educational level and preferred candidate are independent.
a. If X2 = 7.2, what would you conclude at significance level .10?
b. If there were only four candidates running for election, what would you conclude if X2 = 14.5 and a = .05?