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2. A district supervisor of a certain school surveyed 28 randomly selected teachers and found that they work an average of 42.6 hours a week and the standard deviation was 3.75 hours.

2. A district supervisor of a certain school surveyed 28 randomly selected teachers and found that they work an average of 42.6 hours a week and the standard deviation was 3.75 hours.

MATLAB: An Introduction with Applications
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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Answer number 2 only. 

I. Determine the appropriate test statistics (z-test, t-test or f-test) that will be applied for each of the following problem statements. Write your answer on the space provided. 1. A sample of 70 observations was selected from a normal population. The sample mean is 2.78 and the sample standard deviation is 0.83. Another sample of 58 observations was selected from a normal population. The mean sample is 2.63 and the sample standard deviation is 0.75. 2. A district supervisor of a certain school surveyed 28 randomly selected teachers and found that they work an average of 42.6 hours a week and the standard deviation was 3.75 hours. 3. A researcher randomly selected a sample of 550 residents and found that 495 of them do have household pets.
Transcribed Image Text:I. Determine the appropriate test statistics (z-test, t-test or f-test) that will be applied for each of the following problem statements. Write your answer on the space provided. 1. A sample of 70 observations was selected from a normal population. The sample mean is 2.78 and the sample standard deviation is 0.83. Another sample of 58 observations was selected from a normal population. The mean sample is 2.63 and the sample standard deviation is 0.75. 2. A district supervisor of a certain school surveyed 28 randomly selected teachers and found that they work an average of 42.6 hours a week and the standard deviation was 3.75 hours. 3. A researcher randomly selected a sample of 550 residents and found that 495 of them do have household pets.
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