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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 sample of 40 restaurants in the Fine Dining group showed that the average rating was an 85. Past data indicate that the population standard deviation for fine restaurants is relatively stable, with sigma = 4. Calculate a 90% confidence interval for the population mean index for this type of restaurants. Group of answer choices 78.42 to 91.58 83.74 to 86.26 84.84 to 85.16 83.96 to 86.04

The National Quality Research Center at the University of Michigan provides a quarterly measure of consumer opinions about products and services. A sample of 40 restaurants in the Fine Dining group showed that the average rating was an 85. Past data indicate that the population standard deviation for fine restaurants is relatively stable, with sigma = 4. Calculate a 90% confidence interval for the population mean index for this type of restaurants. Group of answer choices 78.42 to 91.58 83.74 to 86.26 84.84 to 85.16 83.96 to 86.04

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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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 sample of 40 restaurants in the Fine Dining group showed that the average rating was an 85. Past data indicate that the population standard deviation for fine restaurants is relatively stable, with sigma = 4. Calculate a 90% confidence interval for the population mean index for this type of restaurants.
Group of answer choices
78.42 to 91.58
83.74 to 86.26
84.84 to 85.16
83.96 to 86.04
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