Cholesterol levels are measured for 15 heart attack patients

Cholesterol levels are measured for 15 heart attack patients (two days after their attacks) and 28 other hospital patients who did not have a heart attack. The sample of heart attack patients had a mean cholesterol level of 227.6 and standard deviation 40.8. The sample of other hospital patients had a mean cholesterol level of 209.1 and standard deviation 14.6. The degrees of freedom for the t-distribution in this case is df = 16. The doctors leading the study think cholesterol levels will be higher for heart attack patients. Test the claim at the 0.05 level of significance. Use heart attack patients as \"Population 1\" and non-heart attack patients as \"Population 2.\" What type of test is this? What is the test statistic? What is the p-value? What is the statistical decision? This means we conclude that the population mean cholesterol level of heart attack patients is higher than the population mean cholesterol level of other hospital patients. Now create a 95% confidence interval for the difference between population mean cholesterol levels for heart attack patients and other hospital patients.

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