PARAMETRIC TESTS

PARAMETRIC TESTS

the tests applied to data that are normally distributed, the levels, of measurements which are expressed in the interval and ratio.

the distribution is normal

We use a parametric test when

The level of measurement to be analyzed is expressed in interval and

ratio data.

We use a parametric test when

t-test for independent sample

t-test is a test of the difference between two independent groups where the means are compared (-x1 & -x2)

When we compare the means of two independent groups

When do we use the t-test for independent samples?

When the samples are less than 30

When do we use the t-test for independent samples?

formula for t-test for independent samples

T-tests for Correlated Samples (paired t-test)

another parametric test applied to one group of samples

When the samples are less than 30.

when do we use paired t-test / t-test for correlated samples?

T-tests for Correlated Samples (paired t-test)

can be used in the evaluation of certain program or treatment

When the mean before (pretest) and the mean after (post test) are being compared

When do we use the t-test for a correlated sample?

to find out if a difference exists between the before and

after means.

Why do we use the t-test for correlated samples?

an appropriate test for the evaluation of government programs. This is used in an experimental design to test the effectiveness of a certain technique or method or program that had been developed

Why do we use the t-test for correlated samples?

formula for t-test for correlated samples / paired t-test