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Testing a null hypothesis at a .05 level of significance

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Assume that it is well established that the average number of correctly recalled items from a 50 item word list is 22 words. A cognitive psychologist is interested in knowing if a new mnemonic training program will improve recall on a 50 item word list. She gives the mnemonic program to 16 students and then tests their recall on a 60 item word list. The number of correctly recalled items are shown below:

16, 25, 30, 27, 18, 33, 24, 20, 25, 23, 17, 28, 35, 15, 31, 28

Test the null hypothesis at the .05 level of significance.

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This solution shows how to calculate the given null hypothesis at a .05 level of significance.

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H_0: μ_(tests with new study aid)=22
H_a: μ_(tests with new ...

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