Chapter 11.5, Problem 55E

(A) If $120$ scores are chosen from a normal distribution with mean and standard deviation $8$, how many scores $x$ would be expected to satisfy $67\le x\le 83$

(B) Usea graphing calculator to generate $120$ scores from the normal distribution with mean $75$ and standard deviation $8$. Determine the number of scores $x$ such that $67\le x\le 83$, and compare your results with the answerto part (A).