A restaurant knows that the weights of its quarter-pound hamburgers (before cooking) are normally distributed with a mean µ pounds and standard deviation of 0.02 pounds. A manager wants to infer about the population mean weight µ. To this end, he randomly selected 64 hamburgers and found the sample mean weight was x̅ = 0.242 pounds. Find a 90% confidence interval for µ.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A restaurant knows that the weights of its quarter-pound hamburgers (before cooking) are normally distributed with a mean µ pounds and standard deviation of 0.02 pounds. A manager wants to infer about the population mean weight µ. To this end, he randomly selected 64 hamburgers and found the sample mean weight was x̅ = 0.242 pounds. Find a 90% confidence interval for µ.   

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