SOLUTION: A population of scores has a mean of 42.In this population, and X value of 40 corresponds to a z = -0.50. What is the population standard deviation?

Algebra ->  Probability-and-statistics -> SOLUTION: A population of scores has a mean of 42.In this population, and X value of 40 corresponds to a z = -0.50. What is the population standard deviation?       Log On


   

Question 359064: A population of scores has a mean of 42.In this population, and X value of 40 corresponds to a z = -0.50. What is the population standard deviation?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the z score,
z=%28x-mu%29%2Fsigma
sigma=%28x-mu%29%2Fz
sigma=%2840-42%29%2F%28-0.5%29