On Wed, 5 Apr 2000, dennis roberts wrote:
> how come when you do a pdf on a unit norm distribution and one say, where
> mean is 100 and sd = 15 ... you get different pdf values along the Y
> axis??? is it just because the lenght of the continuity along X is
> narrower/wider?
Area under a pdf, from -inf to +inf, must total unity. A normal
distribution whose s.d. = 15 is 15 times as wide as one whose s.d. = 1,
and to maintain the constant area, the height of the former must be
1/15th that of the latter. (As your plots display.)
-- Don.
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Donald F. Burrill [EMAIL PROTECTED]
348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED]
MSC #29, Plymouth, NH 03264 603-535-2597
184 Nashua Road, Bedford, NH 03110 603-471-7128
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