A health club is interested in finding out which of two brands of aerobic exercise....?

M

marz

New member
A health club is interested in finding out which of two brands of aerobic exercise equipment provides a more vigorous workout. They purchase 10 machines of each type and for five days between 9 and 12 AM they measure the average pulse rate of each person who is working out on one of these 20 machines. This is an example of

A) an experiment.
B) an observational study, not an experiment.
C) a paired data experiment.
D) a stratified experiment.
 
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