A house cleaning service claims that it can clean a four-bedroom house in average 2 hours. You want to test the house cleaning service’s claim. A sample of n = 81 houses is taken and the sample mean is found to be 1.95 hours and the sample standard deviation is found to be 0.2 hours. Using a 5% level of significance , can you conclude that the house cleaning service’claim is false, corresponding population mean is different from 2 hours?

A house cleaning service claims that it can clean a four-bedroom house in average 2 hours. You want to test the house cleaning service’s claim. A sample of n = 81 houses is taken and the sample mean is found to be 1.95 hours and the sample standard deviation is found to be 0.2 hours. Using a 5% level of significance , can you conclude that the house cleaning service’claim is false, corresponding population mean is different from 2 hours?

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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