solve Hypothesis Testing II problems
Read KW 8.4.2
Cholesterol levels were measured for 28 hospital patients who had suffered heart attacks; their mean cholesterol level was 253.9, with a standard deviation of 47.7. Cholesterol levels were measured for 30 other hospital patients who had not suffered from heart attacks; their mean cholesterol level was 193.1, with a standard deviation of 22.3.
Let Group 1: patients who had suffered from heart attack
Let Group 2: patients who had not suffered from heart attacks.
We are going to conduct a difference of means test by using t-statistic.
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