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# Calculating Normal Curve Percentiles on the TI-84 - bell curve percentages calculator

Calculating Normal Curve
Percentiles on the TI-84
These instructions will
work for the TI-83 and
TI-84 families of
calculators.
We have a national examination given to a
large group of students and we know the
data is normally distributed. The average for
the data is 300 with a standard deviation of
50. What is the percentile score of someone
who earns 215 on the exam?
Identify the average (300), the standard
deviation (50), and the raw score (215).

What is bell curve percentages? Bell curve percentages are various values that are used in the plotting of a density curve to represent a normal distribution in a histogram. The percentages obeyed by all bell curves are 68, 95 and 99.7. The curves are always above the axis. Each of the percentages in the curve represents a given range of values.

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Title: Slide 1
Author: Camille
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CreationDate: Sat Aug 22 20:32:14 2009
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