Question

A trade magazine routinely checks the​ drive-through service times of​ fast-food restaurants. 95​% confidence interval that results from examining 609 customers in one​ fast-food chain's​ drive-through has a lower bound of 160.8 seconds and an upper bound of 160.8 seconds. What does this​ mean?

Answer 1

Answer:

z= 1.70 Since the test statistic is less than the critical​ value, we can conclude that the average length of an online video is not more than 8 minutes