SOLUTION: If the completion time for a task is normally distributed with a mean of 15 seconds and a standard deviation of 2.5 seconds, what is the probability of getting a time less than 9.7

Algebra ->  Probability-and-statistics -> SOLUTION: If the completion time for a task is normally distributed with a mean of 15 seconds and a standard deviation of 2.5 seconds, what is the probability of getting a time less than 9.7      Log On


   

Question 440002: If the completion time for a task is normally distributed with a mean of 15 seconds and a standard deviation of 2.5 seconds, what is the probability of getting a time less than 9.7 seconds?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

*Note: z+=+blue%28x+-+mu%29%2Fblue%28sigma%29

   z = (9.7-15)/2.5 = -2.12

 P(z < -2.12) = NORMSDIST(-2.12)= .017