Question
A survey of 50 retail stores revealed that the average price of a microwave was $375, with a sample standard deviation of $20. Assuming the
A survey of 50 retail stores revealed that the average price of a microwave was $375, with a sample standard deviation of $20. Assuming the population is normally distributed, what is the 95% confidence interval to estimate the true cost of the microwave?
A. $323.40 to $426.60
B. $328.40 to $421.60
C. $350.80 to $395.80
D. $369.31 to $380.69
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Basic Business Statistics Concepts And Applications
Authors: Mark L. Berenson, David M. Levine, Timothy C. Krehbiel
12th Edition
132168383, 978-0132168380
