Question

From many years of record-keeping, it was determined that the mean waiting time for customers in the drive-thru line at McDonald's is 3.1 minutes. A sample of 20 customers in the drive-thru line gave a mean waiting time of 2.9 minutes with a standard deviation of 0.7 minutes. At the 0.05 significance level, can we conclude that the mean waiting time is less than 3.1 minutes?

Name: from many years of record keeping it was determined that the mean waiting time for customers in the drive thru line at mcdonalds is 31 minutes a sample of 20 customers in the drive thru line 95976
Uploaded: 2023-01-31T11:22:40-08:00
Duration: 2 min 44 s
Channel: Madhur L
Description: from many years of record keeping it was determined that the mean waiting time for customers in the drive thru line at mcdonalds is 31 minutes a sample of 20 customers in the drive thru line 95976

          From many years of record-keeping, it was determined that the mean waiting time for customers in the drive-thru line at McDonald's is 3.1 minutes. A sample of 20 customers in the drive-thru line gave a mean waiting time of 2.9 minutes with a standard deviation of 0.7 minutes. At the 0.05 significance level, can we conclude that the mean waiting time is less than 3.1 minutes?

Added by Donna K.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Solved by Expert Madhur L

01/31/2023

Step 1

The null hypothesis states that the mean waiting time is equal to 3.1 minutes. The alternative hypothesis states that the mean waiting time is less than 3.1 minutes. Null hypothesis (H0): μ = 3.1 Alternative hypothesis (H1): μ < 3.1 Show more…

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From many years of record-keeping, it was determined that the mean waiting time for customers in the drive-thru line at McDonald's is 3.1 minutes. A sample of 20 customers in the drive-thru line gave a mean waiting time of 2.9 minutes with a standard deviation of 0.7 minutes. At the 0.05 significance level, can we conclude that the mean waiting time is less than 3.1 minutes?