Question

The researcher wants to know whether the pre-treatment blood pressure and post-treatment blood pressure differ significantly for the whole sample of subjects (regardless of which group they were assigned to).

1. What type of t test should be performed?

2. What is your rationale for selecting this t test?

The researcher wants to know whether the female subjects and the male subjects differ significantly in the pre-treatment blood pressure (regardless of which group they were assigned for the experiment).

1. What type of t test should be performed?

2. What is your rationale for selecting this t test?

Answer 1

1. Type of t test that should be performed:

Dependent Samples t test for paired samples

EXPLANATION:

Here the two samples are: (i) pre-treatment of blood pressure and (ii) post - treatment blood pressure. These 2 samples are not independent. They are correlated pairs, since the sample sample is tested 2 times : before and after treatment.

2.. Type of t test that should be performed:

Independent Samples t test

EXPLANATION:

Here the two samples are: (i) blood pressure of male subjects and (ii) blood pressure of female subjects. These 2 samples are independent