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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
1 Nov 2021

Given information

Step-by-step explanation

Step 1.
 
The Central Limit Theorem for Sums z-score and standard deviation for sums:
z for the sample mean =  
 
[-360]/(20*0.7)
-25.71
-26.00(round to nearest whole)  
 

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