Question

Which of the following tests should be administered to see if an experimental medicine lowers blood pressure among hypertensive patients? A. two-tailed test OB. right-tailed test OC. alternative test OD. left-tailed test

Answer 1

We have to select the appropiate test to see if an experimental medicine lowers blood pressure among hypertensive patients.

In this case, we want to test if the mean for the blood pressure after the treatment is significantly lower than the blood pressure mean without treatment.

Then, for the blood pressure to be significantly different it has to be to the left of a critical value.

Then, it is a left-tailed test.

Answer: