I know that the 1 standard deviation is 68% and a 2 standard is 95 %. What should I do first, in order too set up the problem? I came up with .975, but only from using an calulator. Am i suppose to subtract the numbers or add in the z from the z score table?
Between 1 standard deviation below the mean and 2 standard deviation above the mean.
More than 2 standard deviation away from the mean.