JMP Instructions:
One Sample T Test


We illustrate how to use JMP to do a one sample t-test with the example on pages 362 and 363 of your textbook involving Axial Stress Testing of a New Alloy. This is the JMP table with the data:

We proceed as follows:

Notice that we have entered 500,000 since we are testing a null hypothesis involving this mean number of cycles to failure.

Since the null hypothesis is that the mean number of cycles to failure is less than 500,000 we use the one-sided P-value Prob > t = 0.0020.

Had the null hypothesis been that the mean number of cycles to failure is more than 500,000 we use the one-sided P-value Prob < t = 0.9980.

Had the test been two-sided we would have used the two-sided P-value Prob > |t| =0.0041.