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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
2 Nov 2021

Given information

Mean  

Standard deviation   

Sample size 

Z score =  

Step-by-step explanation

Step 1.

Mean of the sum of  values    

The standard deviation of   values 

Using Z score formula , 

 

Substituting the values, 

   

   

 

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