A population has µ = 50 and σ = 5.If 10 points are added to every score in the population,what are the new values for the mean and standard deviation?
A)µ = 50 and σ = 5
B)µ = 50 and σ = 15
C)µ = 60 and σ = 5
D)µ = 60 and σ = 15

Question

Quizplus · Accepted Answer

Adding a constant value to every score in a population will not change the standard deviation of the population, but it will change the mean by the same amount added. 
So the new mean will be 50+10=60 and the standard deviation will still be 5. Therefore, the correct answer is C.

A Population Has µ = 50 and σ = 5