math

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

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  1. 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?

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

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