Question

Read the scenario and answer the question that follows:

An experiment was set up to study two drugs, Lipanthyl and Befizal, based on their effect on cholesterol level in blood. A group of 25 men with high cholesterol level were randomly assigned one of the two drugs. The level of LDL was measured right before the treatment and again after the 3-month treatment.

Suppose we wanted to compare the LDL levels of the subjects on Lipanthyl versus those on Befizal.

1. Would you perform a one-sample t-test, a paired t-test or an independent samples t-test on these data?
2. Explain your answer.
3. Write down the explanatory variable and the response variable in this study.

Answer 1

Answer:

a)

A paired t - test :

Generalization:

• Here we are thinking about just Lipanthyl.
• Similar patients are estimated pre and post treatment.
• So it is a (combined) paired t-test.

b)

• Here we need to think about contrast between mean estimations of LDL level estimation for similar patients taken at two distinct occasions.
• Accordingly the qualities are coordinated for each person in each example estimation.
• Consequently, we should utilize a matched t-test.

c)

Explanatory Variable:

Treatment utilizing drug Lipanthyl

Response Variable:

Level of LDL in blood

Logic:

• Here we need to see if LDL level in blood is influenced by the treatment.
• In this way, we need to check if utilizing Lipanthyl influences the LDL level in blood.
• In this case, the treatment(or Lipanthyl) winds up free variable i.e., explanatory variable and LDL level ends up ward variable i.e., response variable.