(b) The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of 6.7 minutes and a standard deviation of 2.1 minutes. Let i be the mean delivery time for a random sample of 16 orders at this restaurant. Calculate the mean and standard deviation of i and describe the shape of its sampling distribution.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 31PPS
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(b) The delivery times for all food orders at a fast-food restaurant during the lunch hour
are normally distributed with a mean of 6.7 minutes and a standard deviation of 2.1
minutes. Let i be the mean delivery time for a random sample of 16 orders at this
restaurant. Calculate the mean and standard deviation of i and describe the shape of
its sampling distribution.
Transcribed Image Text:(b) The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of 6.7 minutes and a standard deviation of 2.1 minutes. Let i be the mean delivery time for a random sample of 16 orders at this restaurant. Calculate the mean and standard deviation of i and describe the shape of its sampling distribution.
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