A market researcher is studying the use of coupons by consumers of varying ages.She classifies consumers into four age categories and counts the number of grocery store customers who use at least one coupon during check out.It is expected that data are uniformly distributed across the four age categories.The observed data results in frequencies of 22, 35, 32, and 21.Using $\alpha$= .05, the critical chi-square value is _______.

Question

Quizplus · Accepted Answer

Given that there are four categories and the expectation of uniform distribution across these categories, the degrees of freedom (df) for the chi-square test would be the number of categories minus one, which is 4 - 1 = 3. For a significance level (alpha) of 0.05 and 3 degrees of freedom, the critical chi-square value is 7.8147.

A Market Researcher Is Studying the Use of Coupons by Consumers