SOLUTION: Assume the random variable x is normally distributed with mean 85 and standard deviation 5. Find the indicated probablilty. P(69 < x <75)

Algebra ->  Probability-and-statistics -> SOLUTION: Assume the random variable x is normally distributed with mean 85 and standard deviation 5. Find the indicated probablilty. P(69 < x <75)      Log On


   

Question 1109272: Assume the random variable x is normally distributed with mean 85 and standard deviation 5. Find the indicated probablilty.
P(69 < x <75)
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
z is between -16/5 and -10/5 or between -3.2 and -2
That probability is 0.0221