大家好，想請問大家會如何解這題？
The heights of 5000 students at a local college have a mean of 155.0
centimeters and a standard deviation of 7.5 centimeters. What is the
height, in centimeters, that is 1.4 standard deviations above the mean?
這題我實在是有點有看沒有懂，所以他的意思是標準差提高為8.9的話標準差會如
何變化嗎？謝謝大家