Emily S.

asked • 04/10/16

Finite math

The heights of a given population are normally distributed with a mean of 5.8 ft and a standard deviation of 0.3 ft. What is the cutoff height to be in the top (tallest) 10% of the population? That is, what is the lowest height one could be in feet to be considered part of the tallest 10% of the population?

Chris B.

Tip:  
5.8 is the mean.  Each standard deviation is 0.3.
look for the % needed: closest to 90%.
5.8 plus 0.3 + 0.3 + 0.3 ... until you arrive at the value represented by 90%.
 
I'm assuming you need to learn how to calculate this, not just that you "need" the answer...
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04/10/16

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