题目
In ABC Company, the mean age of the 100 employees is 35 and the standard deviation is 15. Assuming that the ages are normally distributed and using 95% confidence level, we can say that the employees within the firm fall between:
选项
A.20.0 and 50.0 years
B.31.7 and 38.3 years
C.33.8 and 36.2 years
D.32.1 and 37.9years
答案
D
解析
「huixue_img/importSubject/1564169387013967872.png」