Refer to Scenario 17.3. What is the appropriate test to determine whether sales results of the new running suit are similar to what would be expected given the previous sales history of sweatshirts made of the three fabrics?
A) Regression analysis
B) z-test for comparing sample mean against a standard
C) Chi-square test
D) z-test for comparing sample proportion against a standard
E) None of the above.

Question

Quizplus · Accepted Answer

The Chi-square test is appropriate for comparing observed frequencies (sales results of the new running suit) with expected frequencies (previous sales history of sweatshirts made of the three fabrics) to determine if there is a significant difference.