Regular employee in IBM receives an average of M=40.5 emails per day. This situation causes distractions among employees. Two months after the new system was practiced, a random sample of 35 employees said that they were receiving an average of x-  = 31.4 emails per day. the main server of the computers showed that standard deviation = 18.1.  Has the new system had any effect? Use 5 % level of significance to test the claim that there has been a change either way in the average number of email received per day per employee.  (USE p-value method)  and (USE traditional method). I have worked this I am trying to confirm my answers.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Regular employee in IBM receives an average of M=40.5 emails per day. This situation causes distractions among employees. Two months after the new system was practiced, a random sample of 35 employees said that they were receiving an average of x = 31.4 emails per day. the main server of the computers showed that standard deviation = 18.1.  Has the new system had any effect? Use 5 % level of significance to test the claim that there has been a change either way in the average number of email received per day per employee.  (USE p-value method)  and (USE traditional method).

I have worked this I am trying to confirm my answers.

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