[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
I'm trying to crunch these numbers. Can someone tell me what "normsinv" is?
[/ QUOTE ]
An Excel statistic function fully explained in the help section of said program.
[/ QUOTE ]
So I guess I can't do this with my calculator???
[/ QUOTE ]
Nope. But you could go look it up in a
z-score table. If your confidence interval is 95%, you take (1-0.95)/2, or 0.025, subtract it from 1 to get .975, and then look for .975 in the table. In this case, it is 1.96.