| i Question Help * | 7 t A rade magazine routinely checks he drive-through serv

Question

| i Question Help * | 7 t A rade magazine routinely checks he drive-through service times o ast food restaurants. A 90% con dene i terva na res ts for e fast-food chain's drive-through has a lower bound of 170.5 seconds and an upper bound of 174.1 seconds. What does this mean? Choose the correct answer below mnr s e, no 0 A. One can be 90% confident that the mean drive-through service time of this fast-food chain is 172.3 seconds O B. The mean drive-through service time of this fast-food chain is 172.3 seconds 90% of the time. C One can be 90% confident that the mean drive through service time of this as ood chan is between 70-5 seconds and t74 t seconds. 0 D. There is a 90% probability that the mean drive-through service time of this fast-food chain is between 170.5 seconds and 174.1 seconds. Click to select your answer

Explanation / Answer

90% confidence interval indicates that we are 90% confident that the true mean will be between the limits of the confidence interval.

Hence,

Option D is correct.

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