Question 1 a) The number of cars sold annually by used car salespeople is normally distributed with a population standard deviation of 18. A random sample of 225 salespeople was taken and the mean number of cars sold annually was found to be 75. Find the 97% confidence interval estimate of the population mean.Enter the lower endpoint of the interval in the first blank and the upper endpoint in the second blank. Do not round your answer or intermediate steps. You must use critical values from the tables

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Question 1
a) The number of cars sold annually by used car salespeople is
normally distributed with a population standard deviation of 18. A
random sample of 225 salespeople was taken and the mean
number of cars sold annually was found to be 75. Find the 97%
confidence interval estimate of the population mean.Enter the
lower endpoint of the interval in the first blank and the upper
endpoint in the second blank. Do not round your answer or
intermediate steps. You must use critical values from the tables
Transcribed Image Text:Question 1 a) The number of cars sold annually by used car salespeople is normally distributed with a population standard deviation of 18. A random sample of 225 salespeople was taken and the mean number of cars sold annually was found to be 75. Find the 97% confidence interval estimate of the population mean.Enter the lower endpoint of the interval in the first blank and the upper endpoint in the second blank. Do not round your answer or intermediate steps. You must use critical values from the tables
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