2) Sample mean can be used to make estimations of population mean. Considering the following example: It is known that population standard deviation is 11 days for the days of absence per worker per year in an industry. A random sample of 100 workers gives a mean of 8 days' absence. a. Please calculate the standard error of the sample mean. b. Please construct 95 percent confidence intervals for the population mean (Z0.025 = 1.96). c. Please construct 99 percent confidence intervals for the population mean (Zo.005 = 2.575). d. Comparing your answers from subquestions b and c, sustained your findings.
2) Sample mean can be used to make estimations of population mean. Considering the following example: It is known that population standard deviation is 11 days for the days of absence per worker per year in an industry. A random sample of 100 workers gives a mean of 8 days' absence. a. Please calculate the standard error of the sample mean. b. Please construct 95 percent confidence intervals for the population mean (Z0.025 = 1.96). c. Please construct 99 percent confidence intervals for the population mean (Zo.005 = 2.575). d. Comparing your answers from subquestions b and c, sustained your findings.
MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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Transcribed Image Text:2) Sample mean can be used to make estimations of population mean.
Considering the following example:
It is known that population standard deviation is 11 days for the days of
absence per worker per year in an industry. A random sample of 100 workers
gives a mean of 8 days' absence.
a. Please calculate the standard error of the sample mean.
b. Please construct 95 percent confidence intervals for the population mean
(Zo.025 = 1.96).
c. Please construct 99 percent confidence intervals for the population mean
(Z0.005 = 2.575).
d. Comparing your answers from subquestions b and c, sustained your findings.
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