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# is the function normpdf ever used?

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is the function normpdf on graphing calculators ever used?

Apr 24, 2015

#6
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That got me thinking.  I have never thought about the formula for the Gaussian curve before.

This is an extract from     http://en.wikipedia.org/wiki/Normal_distribution

Apr 26, 2015

#1
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Yes it is but I am not sure how.  What exact question would it be used for?

I'd like to know too :/

Apr 25, 2015
#2
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normpdf calculates the probability density function values for a normal distribution of given mean and standard deviation.

For example, if we have a normal distribution with mean 10 and standard deviation 3 and we want to know the value of the probability density at 12, then normpdf(12,10,3) = 0.106483   (at least, that's how it's done on the TI-Nspire calculator).

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Apr 25, 2015
#3
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Yes but what does that actually mean Alan ?

Apr 25, 2015
#4
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Perhaps this graph will help:

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Apr 25, 2015
#5
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Thanks Alan, now I understand :)

Apr 26, 2015
#6
+95361
+5

That got me thinking.  I have never thought about the formula for the Gaussian curve before.

This is an extract from     http://en.wikipedia.org/wiki/Normal_distribution

Melody Apr 26, 2015