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What is the power of the test if the true mean is $670?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

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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Question

Mrs. Sal is considering of running a saloon business. The present owner claimed that over the past 6
years the average daily revenue has been RM 675 with a standard deviation of RM 75. A sample of 30
selected days reveals daily average revenue of RM 625. Use p- value approach.

What is the power of the test if the true mean is $670?

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