Chapter 10- Independent Samples T-test

Question 1

When is an Independent Samples T test done?

Answer 1

An independent samples t test is conducted when a researchers is comparing two independent samples, between groups design

Question 2

What is the difference between the independent t test and paired samples t test

Answer 2

The differences between the paired samples and independent samples are that the paired samples is a within groups design and the independent is a between groups design. In the paired groups, the researcher looks at the difference between two scores taken from the same subjects; the independent compare sample means (differences between means NOT scores). For the independent t test, each participant is assigned to only one condition.

Question 3

What is a researcher looking at when he uses the independent t test?

Answer 3

When a researcher uses the independent t test, he is looking at difference between two independent groups- a distribution of difference between means

Question 4

What is pooled variance?

Answer 4

Pooled variance is a weighted average of the two estimates of variance, one from each sample that are calculated when conducting an independent samples t test.