Deteremine wheather the sample is dependent of independent T

Deteremine wheather the sample is dependent of independent:

To test the effectiveness of a drug, comma cholesterol levels are measured in 60 men before and after the treatment

The samples are...

A. independent because there is a natural pairing between the two samples.

B. The samples are dependent because there is a natural pairing between the two samples.

C.The samples are dependent because there is not a natural pairing between the two samples.

D.The samples are independent because there is not a natural pairing between the two samples.

Solution

B. The samples are dependent because there is a natural pairing between the two samples.

Reason: Tested the effectiveness of a drug on same data. This can be investigated using Paired T - Test ( T - Test For Different Of Means if The Samples are Dependent )