Percentiles With The Normal Distribution Curve Worksheet printable pdf download

Percentiles With The Normal Distribution Curve Worksheet

NAME:____________________________________________________

DATE:_________

Algebra 2/Trig – Percentiles with the Normal Distribution Curve CLASSWORK

PERIOD:_______

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1. On a test that has a normal distribution of scores, a score of 57 falls one standard deviation below the mean,

and a score of 81 is two standard deviations above the mean. Determine the mean score of this test.

Learning Goal: Percentiles with the Normal Distribution Curve

The term percentile refers to the percentage of data that lies at or below a certain score.



For example:

- If you are in the 90

percentile for your height, that means 90% of the sample population had a lower

height than you (i.e. you are taller than 90% of the sample population)

- If you are in the 65

percentile for SAT scores, that means 65% of the sample population had a lower

score than you (i.e. you scored better than 65% of the sample population).



The mean (at the center peak of the curve) is the 50

percentile.



Adding the given percentages from the chart will let you find certain percentiles along the curve.

Percentiles With The Normal Distribution Curve Worksheet