Question 1200154
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Treat the number of months X after January 1 that someone is born as uniformly distributed from 0 to 12. 
Round all answers to 4 decimal places where possible.

A) What is the distribution of X? ~ U
(0,12)
Correct
 
B)Suppose that 40 people are surveyed.  What is the distribution of 
 _                   
 X ~ N
(  ,   ) ?

C)What is the probability that the average birth month of the 40 people will be more than 5.5? 

* I got part A correct but I don't understand how to solve letter B and C. I also have been using a TI-84 Calculator for these problems. 
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I do not agree that this random variable X is uniformly distributed  [0,12]  inclusive.


It is a discrete random variable uniformly distributed  [1,12]  inclusive,  instead.



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As a remainder:   there are  12  months in a year,  and they are traditionally numbered from  1 (January)  to  12 (December).



Thank you for your attention.



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I also noticed that your computer program says  " Correct "  on your answer  (A).


It means that this program is  DEFECTIVE.    Report about this bug to upper instances.