Re: How do you find the percentage on a normal curve of an exact value?

Author: benjaminjbrady@xxxxxxxxx said:


*** Date: Feb 26, 2007 6:33 PM
Subject: How do you find the percentage on a normal curve of an exact value?

I'm struggling with this problem for a statistics class. Given the standard deviation (.5) average (2.5)? How do you find what percent of the population has GPA of exactly 3.0? Any help would be greatly appreciated.***


My response

Benjamin:
See *Rounding* Wikipedia to find the INTERVAL relative to the rounded value______3.0

I would say _________[2.95 , 3.05[

Wich gives F(Z=3.05) - F(Z=2.95), being F(Z) the normal standard CDF.

The remainder is your job.

_______licas (Luis A. Afonso)
.