A random sample of medical records from 28 heart attack patients at a Boston hos

Question

A random sample of medical records from 28 heart attack patients at a Boston hospital was used to better understand the relationship between cholesterol and heart failure. The cholesterol levels of heart attack patients was recorded several times after the patient had a heart attack: at 2 days, 4 days, and 14 days post-heart attack. For this assignment, we will just compare the day-2 and day-4 cholesterol levels to see if there is a significant difference between the two measurements. 15. [2 pts] Select one answer in each set of brackets to best describe this study. Day (2 or 4) is the {explanatory response variable and it is {categorical quantitative) Cholesterol level is the explanatory response) variable and it is (categorical quantitative) 16. What type of study design was used? Select one. A. Independent Groups B. Paired with Repeated Measures C. Paired with Matching 17. Write the null and alternative hypothesis in words, in the context of the problem.

Explanation / Answer

Question 16

Here the study design is Paired with repeated measres.

Question 17

Null Hypothesis : H0 : The mean cholestrol level 2 days after the heartattack is equal to the mean cholestrol level 4 days after the heartattack.

Alternative Hypothesis : Ha : The mean cholestrol level 2 days after the heartattack is not equal to the mean cholestrol level 4 days after the heartattack.

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