Hypothesis A: If heart rate is related to caffeine intake, then coffee drinkers will have higher heart rates.

Biology

2 answers:

Tpy6a [65]3 years ago

4 0

Hypotheses B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.

Katen [24]3 years ago

3 0

Answer: D. Hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.

Hypothesis A and B both are suggesting that caffeine intake is related to higher heart rate. But hypothesis B is proving it more certainly by suggesting the affects of caffeine intake on heart rate. As, heart rate of most people will be higher 30 minutes after they drink a cup of coffee is testifying the fact, that higher heart rate is related with caffeine intake.

Therefore, hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.

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