The National Quality Research Center at the University of Michigan provides a quarterly measure of consumer opinions about products and services. A survey of 50 restaurants in the Fast Food / Pizza group showed that the average rating was a 71. Past data indicate that the population standard deviation of the index has been relatively stable, with sigma = 5. Calculate a 90% confidence interval for the population mean index for this type of restaurants.
The National Quality Research Center at the University of Michigan provides a quarterly measure of consumer opinions about products and services. A survey of 50 restaurants in the Fast Food / Pizza group showed that the average rating was a 71. Past data indicate that the population standard deviation of the index has been relatively stable, with sigma = 5. Calculate a 90% confidence interval for the population mean index for this type of restaurants.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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The National Quality Research Center at the University of Michigan provides a quarterly measure of consumer opinions about products and services. A survey of 50 restaurants in the Fast Food / Pizza group showed that the average rating was a 71. Past data indicate that the population standard deviation of the index has been relatively stable, with sigma = 5. Calculate a 90% confidence interval for the population mean index for this type of restaurants.
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