3. Overa long period of time, it was found that the time taken for the standard physical task is normallydistributed with mean 50 seconds, and variance 100 sec². A sample of 75 workers were given a special andunusual diet for three weeks before they were observed performing said standard physical task. The mean timetaken by this sample is 46 seconds. Is this significant evidence that the special diet has made a difference intheir performance. Use a 5%level of significance.

μ= 50 seconds (population mean) σ2 = 100 sec2 (population variance) n= 75 (sample size) x¯ =46…

Answered: istributed with mean 50 seconds, and…

istributed with mean 50 seconds, and variance 100 nusual diet for three weeks before they were observ aken by this sample is 46 seconds. Is this significan

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

3. Overa long period of time, it was found that the time taken for the standard physical task is normally
distributed with mean 50 seconds, and variance 100 sec². A sample of 75 workers were given a special and
unusual diet for three weeks before they were observed performing said standard physical task. The mean time
taken by this sample is 46 seconds. Is this significant evidence that the special diet has made a difference in
their performance. Use a 5%level of significance.

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