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Quick little problem

kittysnyde

New member
Joined
Oct 1, 2009
Messages
5
I'm not really sure how to go about solving this.



"Let a represent the amount of probability within 2.5 standard deviations of the norm. Find a."


I was thinking that since z is the number of standard deviations, that P(-2.5<z<2.5) and a is the area? From the standard normal distribution table 2.5=.4938. So 2(.4938)= .9876?
 

royhaas

Full Member
Joined
Dec 14, 2005
Messages
832
You are correct, assuming a standard normal distribution.
 
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