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Demonstration
Here is a thumbnail of a screen from the statistics program. Click on it to see it full size (66k).
Here is a section of the printout that the student would get for the above question.
4) A biologist was interested in the weights of male and female
Lappin Rabbits. She weighed a random sample of both and
calculated the following sample statistics.
Sample Sample Sample
Size Mean Variance
Male 7 7.4 1.02
Female 11 8.3 1.22
Test a suitable hypothesis.
Your pooled variance was 22. The correct answer was 1.145.
Your test statistic was 23. It was wrong. The correct answer for
YOUR pooled variance was -.397. The correct answer was -1.74.
Your tabulated statistic at the 5% level was 2. The correct
answer was 2.12.
Your tabulated statistic at the 1% level was 4. The correct
answer was 2.921.
Based on the numbers you entered your conclusion was false.
0 out of 10
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