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An industry has 2 factories, A and B. A sample of 300 workers is taken, with an average age of 17 years and a standard deviation of 6.9 years. Factory B, with a sample of 280 workers, showed an average of 18 years old and a standard deviation of 4.5 years. Calculate the value of Z. At the 5% level, can

An industry has 2 factories, A and B. A sample of 300 workers is taken, with an average age of 17 years and a standard deviation of 6.9 years. Factory B, with a sample of 280 workers, showed an average of 18 years old and a standard deviation of 4.5 years. Calculate the value of Z. At the 5% level, can

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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An industry has 2 factories, A and B. A sample of 300 workers is taken, with an average age of 17 years and a standard deviation of 6.9 years. Factory B, with a sample of 280 workers, showed an average of 18 years old and a standard deviation of 4.5 years.

Calculate the value of Z. At the 5% level, can we say that the seniority of the workers at factory A is lower compared to those at factory B?

Select one:

a. -2.23. At the 5% level, it can be stated that the seniority of the workers in factory A is not less .

b. Z = -2.08. At the 5% level, it can be stated that  the seniority of the workers in factory A is the same as compared to those in factory B

c. Z = -2.08. At the 5% level, it can be stated that  the seniority of workers at factory A is lower, compared to those at factory B

d. Z = -2.23. At the 5% level, it can be stated that the workers' antiquities in the two factories are the same.

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