Suppose X has a symmetric continuous probability distribution with E(X)=82, and P(X>100) =0.2, what is P(64<X<100)?...
Suppose X has a symmetric continuous probability distribution with E(X)=82, and P(X>100) =0.2, what is P(64<X<100)? (Hint: Remember E(X) or expected value of X, is the average of X)
- A. 0.2
- B. 0.3
- C. 0.4
- D. 0.6
Homework Answers
Given : E(X)=82 , P(X>100)=0.2
Therefore,
; 
...........(1)
From standard normal probability table ,
..........(2)
From (1) and (2)
Now ,
; From standard normal probability table
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Suppose X has a symmetric continuous probability distribution
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