Textbook ExpertVerified Tutor
31 Oct 2021
Given information
Here, mean of unknown distribution( )= 12
Standard deviation()= 1
Sample size (n)= 25
Step-by-step explanation
Step 1.
Suppose X is a random variable with a distribution that may be known or unknown (it can be any distribution) and suppose:
- μX = the mean of Χ
- σΧ = the standard deviation of X
If you draw random samples of size n, then as n increases, the random variable ΣX consisting of sums tends to be normally distributed,and
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