A study was conducted in which heathy women (aged 35 to 55) received either a ne

Question

A study was conducted in which heathy women (aged 35 to 55) received either a new blood pressure medication or a placebo pill for 5 months. The results indicated that those women who took the actual medication experienced a significantly greater decrease in systolic blood pressure (average decrease = 17mmHg) as compared to those who took the placebo (average decrease =2mmHg). What study design was used in this scenario? What type of variable is medication? What type of variable is Systolic blood pressure? A study was conducted in which heathy women (aged 35 to 55) received either a new blood pressure medication or a placebo pill for 5 months. The results indicated that those women who took the actual medication experienced a significantly greater decrease in systolic blood pressure (average decrease = 17mmHg) as compared to those who took the placebo (average decrease =2mmHg). What study design was used in this scenario? What type of variable is medication? What type of variable is Systolic blood pressure? What study design was used in this scenario? What type of variable is medication? What type of variable is Systolic blood pressure?

Explanation / Answer

This design is CRD with two groups, placebo and medication with either equal or different number of data points. This can also be thought as comparison of mean blood pressure in two distinct populations. Either F test or T test are useful for the testing the corresponding hypothesis. Medication is binary variable. Denote medicated by 1 and placebo by 0. One can think this as categorical variable also. Systolic blood pressure is a continuous variable.

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