using wages 2005 a) calculate the mean and standard deviation for wa

using wages 2005 a) calculate the mean and standard deviation for wages. use the normal distribution to estimate the percent of workers earning more than $36,000. compare this to the actual percent. What is the percentage difference(actual %-expected%) of the two values.
problem possible actual comments ;
compute mean for wages 0.75 0.75 ok
compute standard deviation for wages 0.75 0.75 ok
normal dist for percent workers > 36,000 1 1 ok
actual percent workers > 36,000 1 1 ok
difference of two percentages 0.5 0.5 ok

Total 4 4
its supposed to look like the diagram above