Respuesta :
The number of standard deviations at which the distribution differs from the given mean is; 2.5
How to solve the Central Limit Theorem?
We are given;
Mean; μ = 15
Standard deviation; σ = 4
Sample mean; x' = 25
Formula for z-score is;
z = (x' - μ)/σ
Thus;
z = (25 - 15)/4
z = 2.5
Read more about Central Limit Theorem at; https://brainly.com/question/25800303
#SPJ2