statistics
posted by Tegan on .
In a population of exam scores, a score of x=88 corresponds to z=+2.00 and a score of x=79 corresponds to z=1.00. Find the mean and standard deviation for the population.

z/sigma = score  mean
2 sigma = 88  mean
sigma = 79  mean
subtract second equation from first.
3 sigma = 9
sigma = 3 is the standard deviation
Use either equation to get the mean