SOLUTION: Suppose X is a uniform random variable taking values between 50.00 and 80.00 Find the variance of X. Select one: a. 8.66 b. 37.53 c. 75 d. 6.13

Algebra ->  Probability-and-statistics -> SOLUTION: Suppose X is a uniform random variable taking values between 50.00 and 80.00 Find the variance of X. Select one: a. 8.66 b. 37.53 c. 75 d. 6.13      Log On


   

Question 1121744: Suppose X is a uniform random variable taking values between 50.00 and 80.00
Find the variance of X.
Select one:
a. 8.66
b. 37.53
c. 75
d. 6.13
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The variance is (b-a)^2/12
This is 30^2/12 or 900/12 or 75.
C