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Textbook Expert
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8 Nov 2021

Given information

Mean  

Standard deviation   

Sample size  

Step-by-step explanation

Step 1.

Mean of the sampling distribution = =  

The standard deviation of sampling distribution =      

                                                                             

First quartile percentile

That is, given probability (to the left)

Using  

         

         

 

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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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