Click the link below and save the following JMP file to your Desktop:
Now go to your Desktop and double click on the JMP file you just downloaded.
This action will start JMP and display the content of this file:
Click the Analyze menu, then select Distribution.
Click the Pretest column, then click Y, columns.
The 95% confidence interval for the mean is displayed under Summary Statistics.
If you want to produce, for example, a 90% confidence interval for the mean, click the red down arrow next to Pretest, select Confidence Interval, select 0.90.
You should see the following:
Click on the red down arrow next to Pretest and select Test Mean:
You should see:
Suppose your Null Hypothesis is that the mean is 30. Type 30 in the Specify Hypothesized Mean text box and click OK.
Prob>|t| = .0077 is the p-value for HA: μ ≠
Prob>t = .9961 is the p-value for HA: μ > 30
Prob<t = .0039 is the p-value for HA: μ < 30