Question

About 480 women took part in a study about the effects of hormone therapy on middle-aged women; the women were grouped together in groups of two based on their similarities in height, weight, age, etc. Then one person in each group was randomly assigned to hormone therapy, while the other person was assigned to a placebo (they did not know which). After about a year, blood tests were conducted on each subject by a lab technician who was aware of which group (treatment or placebo) the blood samples originated from. In presenting the results of the experiment, the authors reported that the women in the treatment group had experienced a statistically significant increase in HDL (the so-called "good" cholesterol) and a statistically significant reduction in LDL (the so-called "bad" cholesterol) when compared with the control group.

Select one or more:

This study would be classified as double-blind.

This study would be classified as single-blind.

This study would be classified as un-blinded.

The treatments were the HDL and LDL.

The treatments were the hormone therapy and the placebo.

The subjects are the 480 women in the study.

The subjects are the blood tests.

This is an example of a completely randomized design.

This is an example of a matched pairs design.

Answer 1

Answer::

Correct options are:

This study would be classified as single blind.

The treatments were the hormone therapy and the placebo.

The subjects are the 480 women in the study.

This is an example of a matched pairs design.

(as women are divided into groups based on their similarities in height,weight and age.)

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