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Textbook Expert
Textbook ExpertVerified Tutor
4 Nov 2021

Given information

Mean  

Standard deviation   

Sample size 

Step-by-step explanation

Step 1.

Mean of the sample   

                              

The standard deviation of the sample   

                                                       

First, we corresponding Z score so that the cumulative standard normal probability distribution is equal to 0.10.

So we are looking for , that gives  

Hence, the X score associated with a cumulative probability of is

 

   

     

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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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