Focus groups of 11 people are randomly selected to discuss products of the Famous Company. It is determined that the mean number (per group) who recognize the Famous brand name is 5.7, and The standard deviation is 0.50. Would it be unusual to randomly select 11 people and find that Greater than 9 recognize the Famous brand name?
A) Yes
B) No

Question

Quizplus · Accepted Answer

To determine if it is unusual, we calculate the z-score: z = (9 - 5.7) / (0.50/√11) = 22.08. A z-score this high is extremely rare, indicating it is unusual.

Focus Groups of 11 People Are Randomly Selected to Discuss