In the past, the average age of the employees of a certain company was 40 years. Recently the company has been hiring younger individuals. Some of them are even fresh graduates from the different universities in the country. In order to determine whether there has been a decrease in the average age of all the employees, a random sample of 29 cmployees was selected. The average age of the sample was 35 years with a standard deviation of 11 years. Using 0.05 level of significance, determine whether che age average of all the employees has decreased. Assume normality in the population.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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In the past, the average age of the employees of a certain company
was 40 years. Recently the company has been hiring younger
individuals. Some of them are even fresh graduates from the
different universities in the country. In order to determine
whether there has been a decrease in the average age of all the
employees, a random sample of 29 cmployees was selected. The
average age of the sample was 35 years with a standard deviation
of 11 years. Using 0.05 level of significance, determine whether
the age average of all the employees has decreased. Assume
normality in the population.
CS Scanned with CamScanner
Transcribed Image Text:In the past, the average age of the employees of a certain company was 40 years. Recently the company has been hiring younger individuals. Some of them are even fresh graduates from the different universities in the country. In order to determine whether there has been a decrease in the average age of all the employees, a random sample of 29 cmployees was selected. The average age of the sample was 35 years with a standard deviation of 11 years. Using 0.05 level of significance, determine whether the age average of all the employees has decreased. Assume normality in the population. CS Scanned with CamScanner
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