Question

What parametric statistical method(s) a researcher can use to determine if the mean systolic blood pressure of the population is the same for two groups of subjects (group1=diet restriction; group2=exercise).

Answer 1

Let be the mean systolic blood pressure of the population for two groups of subjects where group1=diet restriction and group2=exercise

In order to determine if the mean systolic blood pressure of the population is the same for two groups of subjects (group1=diet restriction; group2=exercise) we will test that hypothesis as,

So the parametric statistical method a researcher can use to determine if the mean systolic blood pressure of the population is the same for two groups of subjects is Testing of hypothesis of equality of population means.

Here in addition we can say if the population standard deviation for both of cases is known then for a high sample size it is z-test , and if unknown usually it is t-test ( or z-test for large sample size assuming central limit theorem is satisfied).

Hence the answer...............

Thank you.............