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Textbook Expert
Textbook ExpertVerified Tutor
10 Nov 2021

Given information

As per the given question,

  • Effective period of the tranquilizer for each patient (in hours) is followed as :  and 
  • 95% of confidence interval for the population mean length of time to be considered

Step-by-step explanation

Step 1.

Confidence Interval is calculated by using below equation , 

 

 

 

There are  measures in the sample then,

     

 

 

 

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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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