ABSTRACT
Hypothesis evaluated with test Do two independent samples represent two populations with different mean values?'
Relevant background information on test The t test for two independent samples, which is employed in a hypothesis testing situation involving two independent samples, is one of a number of inferential statistical tests that are based on the t distribution (which is discussed in detail under the single-sample t test (Test 2)). Two or more samples are independent of one another if each of the samples is comprised of different subjects2 In addition to being referred to as an independent samples design, a design involving two or more independent samples is also referred to as an independent groups design, a between-subjects design, a betweengroups design, and a randomized-groups design. In order to eliminate the possibility of confounding in an independent samples design, each subject should be randomly assigned to one of the k (where k 2 2) experimental conditions.
