guys, it is 0.005 in the formula, but in real calculation, there are numerious circumstances that 0.5 is used. What is the reason for this? When and why to use? Thanks.

% to decimal. if its in % use .5 if its in demical use .005.

thanks, gotu

Use 0.5 if you count 5% standard deviation as "0.05), right?

happyking02 Wrote: ------------------------------------------------------- > Use 0.5 if you count 5% standard deviation as > "0.05), right? yes.