Question

State the appropriate t-test for each hypothesis and explain your answers. (a) The experimental group will score higher than the control group. (b) Students will score higher on the post-test than they did on the pre-test. (c) Children with autism differ significantly from children without autism on tests of verbal ability

Answer #1

part a

An Independent Samples **t**-**test**
compares the means for two groups.Here 2 groups are experimental
group and the control group.

The test statistic is:

Where,

df = n_{1}+n_{2}-2

Part b

Paired -t test will be used since there is same group observed before and after the test

Test Statistic:

Part c

An Independent Samples **t**-**test**
compares the means for two groups.Here 2 groups are children
without autism group and children with autism

The test statistic is:

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