To graph a Normal Probability plot for this problem we first enter the data into the calculator. I will use list 1.
This will take you to the Lists Menu.
Clear any old data from the list as it may interfere with this new problem.
"1:Plot1..." should be highlighted.
Make sure On is highlighted
Press: (Note: the switch is moved to "On")
Arrow down and right to highlight the last Plot option.
For Data List I entered L1 as that is where I placed my data. |
For Data Axis highlight X and press:
As you can see from the screen there is a noticeable curve.|
(perhaps a cubic model would be appropriate here or a cube root transformation of the data)
It does not appear Normally Distributed.