A trade magazine routinely checks the drive-through service times of fast-food restaurants. Upper A A 90 90 % confidence interval that results from examining 691 691 customers in one fast-food chain's drive-through has a lower bound of 161.9 161.9 seconds and an upper bound of 165.5 165.5 seconds. What does this mean? Choose the correct answer below. A. One can be 90 90 % confident that the mean drive-through service time of this fast-food chain is between 161.9 161.9 seconds and 165.5 165.5 seconds. B. One can be 90 90 % confident that the mean drive-through service time of this fast-food chain is 163.7 163.7 seconds. C. There is a a 90 90 % probability that the mean drive-through service time of this fast-food chain is between 161.9 161.9 seconds and 165.5 165.5 seconds. D. The mean drive-through service time of this fast-food chain is 163.7 163.7 seconds 90 90 % of the time.

Question

Cora

Mathematics

25 February, 09:28

A trade magazine routinely checks the drive-through service times of fast-food restaurants. Upper A A 90 90 % confidence interval that results from examining 691 691 customers in one fast-food chain's drive-through has a lower bound of 161.9 161.9 seconds and an upper bound of 165.5 165.5 seconds. What does this mean? Choose the correct answer below. A. One can be 90 90 % confident that the mean drive-through service time of this fast-food chain is between 161.9 161.9 seconds and 165.5 165.5 seconds. B. One can be 90 90 % confident that the mean drive-through service time of this fast-food chain is 163.7 163.7 seconds. C. There is a a 90 90 % probability that the mean drive-through service time of this fast-food chain is between 161.9 161.9 seconds and 165.5 165.5 seconds. D. The mean drive-through service time of this fast-food chain is 163.7 163.7 seconds 90 90 % of the time.

+4

Answers (1)

Know the Answer?

Sawyer Woods · Answer 1

Step-by-step explanation:

Confidence interval gives possible estimate (range of values) that could contain the population proportion. Confidence level does not not mean probability. It only tells how confident we are that that the population proportion lies within the confidence interval.

Since we were told that the confidence interval has a lower bound of 161.9 seconds and an upper bound of 165.5 seconds, therefore, the correct option for the given situation is

A. One can be 90 % confident that the mean drive-through service time of this fast-food chain is between 161.9 seconds and 165.5 seconds.