MPLE 2 Estimating an Average of a PopulationYou want to know the mean number of hours students with part-timejobs work each week. At each of six schools you randomly survey10 students with part-time jobs. Your results are shown.ch Week, 8, 7, 8,12, 8, 8a. Use each sample to make an estimate for the mean number of hoursstudents with part-time jobs work each week. Describe the variation5, 6, 9, 10of the estimates.6, 5, 610, 8, 6, 12, 12, 16, 10Find the mean of each sample.SampleD70= 71073= 7.31077= 7.710505.10808.10909.10MeanSo, the six estimates are that students with part-time jobs work5,7, 7.3, 7.7, 8, and 9 hours each week. The estimates have a rangeof 95 4 hours.b. Use all six samples to make one estimate for the mean number ofhours students with part-time jobs work each week.440The mean of all sample data isGO7.3 hours.So, you can estimate that students with part-time jobs work7.3 hours each week.ITry It2. Repeat Example 2, but estimate the medians instead of the means.

You want to know the mean number of hours students with part-time jobs work cach week. At each of six schools you randomly survey 10 students with part-time jobs. Your results are shown. a. Use each sample to make an estimate for the mean number of hours students with part-time jobs work each week. Describe the variation of the estimates. Find the mean of each sample. Sample B D E 70 73 77 = 7.3 10 50 5 10 80 8. 10 90 9. 10 Mean 7.7 %3D 10 10 So, the six estimates are that students with part-time jobs work 5, 7, 7.3, 7.7, 8, and 9 hours each week. The estimates have a range of 9 5 4 hours. b. Use all six samples to make one estimate for the mean number of hours students with part-time jobs work each week. 440 The mean of all sample data is GO 7.3 hours. So, you can estimate that students with part-time jobs work 7.3 hours each week. Try It 2. Repeat Example 2, but estimate the medians instead of the means. 7

You want to know the mean number of hours students with part-time jobs work cach week. At each of six schools you randomly survey 10 students with part-time jobs. Your results are shown. a. Use each sample to make an estimate for the mean number of hours students with part-time jobs work each week. Describe the variation of the estimates. Find the mean of each sample. Sample B D E 70 73 77 = 7.3 10 50 5 10 80 8. 10 90 9. 10 Mean 7.7 %3D 10 10 So, the six estimates are that students with part-time jobs work 5, 7, 7.3, 7.7, 8, and 9 hours each week. The estimates have a range of 9 5 4 hours. b. Use all six samples to make one estimate for the mean number of hours students with part-time jobs work each week. 440 The mean of all sample data is GO 7.3 hours. So, you can estimate that students with part-time jobs work 7.3 hours each week. Try It 2. Repeat Example 2, but estimate the medians instead of the means. 7

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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find the p value and explain how it is done.
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