Dr. Walker is interested in the effects of exercise programs on physical fitness

Question

Dr. Walker is interested in the effects of exercise programs on physical fitness level.  She knows that this exercise programs is effective in the adult population yielding a mean physical fitness level of 75 with a standard deviation of 5.5. She recruits 120 adults who are seeking to improve their fitness level and has them complete the exercise program.  Physical fitness level (1-100 high values indicate greater fitness level) was measured at the end of the program.  What is the appropriate statistical test?

Explanation / Answer

Here we have the population standard deviation and n is > 30. There is only one population in question and hence we do a One sample z - test.

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