Please click on the following link and save it to your desktop:
Voter Data
Now go to your desktop and double click on the JMP file.
This process will automatically start JMP and display the following dataset.
To conduct an inference on proportions based on this dataset we will begin by clicking Analyze and selecting Distribution.
The following dialog box will appear.
For this two-sample hypothesis on proportions we will be examining the proportion of people who voted in last years election and those who did not based on their salary. Select Did you vote last year? and then press the Y, Columns button. Next, select What was your Salary then? and then press Freq button.
Note: If your data is unaggregated and you would like to conduct a one-sample hypothesis you would place your variable into Y, Columns and nothing into Freq . The following steps are the same for a two-sample or one-sample hypothesis on proportions.
Your dialog box should now look like the one below.
Click OK.
The following window should now appear.
Move and click your cursor on the red arrow next to Did you vote last year? and select Test Probabilities.
The following table will now appear in your previous window.
Suppose we were interested in performing a two-sample hypothesis test where both the probabilities were set to 50%. We can do this by inserting 0.50 into the Hypoth Prob boxes for both levels N and Y. Now select an alternative hypothesis for the testing probabilities and hit Done. Your results should now look like the following.
