Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 60 people. (You may need to use the standard normal distribution table. Round your answers to the nearest whole number.)

Question

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 60 people. (You may need to use the standard normal distribution table. Round your answers to the nearest whole number.)
(a) How many would you expect to be between 170 and 180 cm tall?
_____  people

(b) How many would you expect to be taller than 176 cm?
______  people

Reiny · Answer

One of the best webpages available for this topic
http://davidmlane.com/hyperstat/z_table.html
It replaces your tables at the back of your text.

enter mean of 170
enter sd of 5

a) click on 'between' and enter 170 and 180
multiply that by 60

b) what do you think?

Anonymous · Answer

thank you so much Reiny that helps. I got it right! Sorry for late response