A Researcher Wants to Investigate the Effectiveness of a Cholesterol-Lowering

question 17

Multiple Choice

A researcher wants to investigate the effectiveness of a cholesterol-lowering medication.The 450 participants are first divided into two groups - those suffering from diabetes and those not suffering from diabetes.Within each group the participants are randomly assigned to one of three groups.The first group will receive a low dose of the medication,the second group will receive a high dose of the medication,and the third group will receive a placebo.At the end of a six-month period,each person's cholesterol will be tested and the change in their cholesterol level will be recorded.Identify the factor(s) and any blocking variables and the number of levels for each.

• A)Factor: Medication (3 levels),Factor: diabetes (2 levels)
• B)Factor: Diabetes,no diabetes (2 levels)
• C)Factor: Medication (3 levels),Blocking variable: diabetes (2 levels)
• D)Factor: Placebo,low dose of medication,high dose of medication (3 levels)
• E)Factor: Placebo and diabetes,low dose of medication and diabetes,high dose of medication and diabetes,placebo and no diabetes,low dose of medication and no diabetes,high dose of medication and no diabetes (6 levels)