Ten volunteers recorded their blood pressure in a room with an aquarium and then in a room without one.The appropriate design for testing the significance of the difference between the means is

Question

Quizplus · Accepted Answer

Since the same group of volunteers are being measured in both the aquarium room and the non-aquarium room, it is appropriate to use a related-samples (or paired-samples) t-test to test the significance of the difference between the means. This type of t-test is used to compare the means of two related groups, such as when the same participants are measured under different conditions.

Ten Volunteers Recorded Their Blood Pressure in a Room with an Aquarium