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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
1 Nov 2021

Given information

Here, the sum (ΣX) = 1,186;

mean (μx) = 3, standard deviation (σx) = 0.7,

and sample size (n) = 400, 

 

Step-by-step explanation

Step 1.

The Central Limit Theorem for Sums z-score and standard deviation for sums;

z for the sample mean=  

 

   

 

 

  

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