Using SAS and JMP to check if x and y ~ N

Normal option generates Shapiro Wilks Stats

Double click here

Shapiro Wilks Stat for x, price charged

Look at p value. If p value >5% then likely that data follows a normal distribution.

Do the same for y (here quantity sold, SAS variable name Q)

Double click here

Again compare reported p value to alpha of 5%. If greater than 5% cannot reject null that Q “follows a normal distribution”.

In JMP

Open table

I have exported SAS workfile to JMP

Click analyze

Select distribution

Highlight P and Q (the two variables being correlated in this problem)

Finish selection by clicking on columns box

Stack diagrams horizontally

Go to fit distribution

Select normal

Right click on fitted normal

Select goodness of fit

Will find same p values found on SAS