This is the type of problem that I am having problems with:

Trying to find the z-score for which a total probability of .02 falls more than z standard deviations (in either direction) from the mean, that is below mean-zo or mean+zo. Not sure how to type special characters but the o = standard deviations.

If anyone could help, I would greatly appreciate it. Getting past this type of problem would be huge for me.

Thanks,

Rich