Import the mileage data of Table 4.2 on Page 111:
Table 4.2 data
Instructions for importing data into JMP
Proceed as in the Histogram JMP tutorial.
Select Normal Quantile Plot from the red pop-up menu over the histogram:
You should get the normal quantile plot below:
One can get a horizontal layout for this plot as follows:
With the plot below it is easier to see if the distribution is skewed.