4 A group of department store buyers viewed a new line of dr

4. A group of department store buyers viewed a new line of dresses and gave their opinion of them: Since the biggest opinion was outstanding, the buyer wants to buy the new line. But a manager believes this is not a clear mandate and claims the opinions are evenly distributed among the six categories. He further states that slight differences amongst the opinions are probably due to chance. Test the null hypothesis that there are no significant differences among the opinions of the buyers. Use an a= 0.1 level of risk. Write the null and alternative hypotheses. HINT: the manager is claiming all categories should be the same. Your decision and why:

Solution

Null hypothesis: mu1=mu2=mu3=mu4=mu5=mu6

Alternative hypothesis: at least one is different

observed

expected

O - E

(O - E)