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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
15 Nov 2021

Given information

 The mean workweek for engineers = 60 hours, The sample size(n)=10; degree of freedom(df)=10-1=9;

Step-by-step explanation

Step 1.

The sample mean for 70; 45; 55; 60; 65; 55; 55; 60; 50; 55;

=( 70+45+55+60+65+55+55+60+50+55)/10=570/10=57;

The sample standard deviation(s);

(s)=  

(s)=7.15;

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