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Old 07-15-2012
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Stats The correct statistical procedure

Two hundred hypertensive patients are randomized to either a diet program or an exercise program. (102 patients to diet program, 98 patients to exercise program) Blood pressure is measured on each patient both before the programs start and 3 months after the start of each program. The correct statistical procedure to determine whether or not the mean blood pressure change (after-before) was statistically significantly different for the two programs is:
a. Paired t-test
b. 2 sample unpaired t-test
c. Fisher’s exact test
d. None of the above
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Old 07-15-2012
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well this example has ---
1 interval data --- ie the blood pressure.

and 1 nominal data with 2 subgroups ie.. the intervention used --either exercise or diet.

so id go with T test

but because this is a before and after type of study.. so the data are linked.
hence it'd be a Paired/Matched T test
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The above post was thanked by:
James Crabb (03-15-2013), Novobiocin (08-05-2012)


Biostatistics-Epidemiology, Step-2-Questions

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