Twenty children with autism participated in a study of the effectiveness of augm
ID: 3067335 • Letter: T
Question
Twenty children with autism participated in a study of the effectiveness of augmentative communication therapy. Researchers hypothesized that the children would show a higher number of spontaneous communication attempts in a 4 hour afternoon therapy session after 3 months of therapy than they did before the therapy began. What type of test should they use to test this hypothesis?
a single sample t-test
a dependent samples t-test
a z-test
an ANOVA
an independent samples t-test
a single sample t-test
a dependent samples t-test
a z-test
an ANOVA
an independent samples t-test
Explanation / Answer
Solution:
As we can see that sample before therapy and after therapy are same so we will use a dependent samples t-test because both are dependent on each other. So its answer is B i.e. a dependent samples t-test.
A sibgle samples t-test will use for one sample only. An anova used for variance rather than mean . an independent sample t-test will be used if both samples are independent of each other.
So in this case we will use a dependent samples t-test.
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