You are reading an article detailing a study designed to compare the average body mass index among hypertensive individuals (persons with high blood pressure) to normotensive individuals. The study was conducted using participants in a health plan
You are reading an article detailing a study designed to compare the average body mass
index among hypertensive individuals (persons with high blood pressure) to
normotensive individuals. The study was conducted using participants in a health plan
offered by a large insurance carrier. 200 randomly selected hypertensive participants
were compared to 200 randomly selected normotensive participants. The study reports a
95% confidence interval (CI) for the mean difference in BMI between hypertensives and
normotensives. The 95% CI is (0.15 kg/m2
, 2.43 kg/m2
). However, no p-value is
reported for testing the null hypothesis of no mean difference in BMI between the two
groups (a mean difference of 0 kg/mg2
) versus the alternative of a non-zero mean
difference. Luckily, you have taken this course, so you are able to determine:
a. the p-value is < .05
b. the p-value is > .05
c. the p-value is exactly .05.
d. the p-value is exactly .009
e. None of the above.
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