Suppose a Study Is Done in Which the Experimental and Control

question 15

Multiple Choice

Suppose a study is done in which the experimental and control groups both get pretests and posttests.Which of the following is the best statistical procedure?

• A)Conduct a paired-samples t-test separately for each group to see whether the experimental group's improvement is more statistically significant than the control group's improvement
• B)Conduct an independent-samples t-test that compares the posttest means only.
• C)Conduct an independent-samples t-test that compares the changes scores in the two groups.
• D)All of these are equally acceptable.

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Definitions:

Andrew Johnson

The 17th President of the United States, serving from 1865 to 1869, known for his efforts to restore the southern states after the Civil War and his subsequent impeachment.

Thaddeus Stevens

A 19th-century U.S. politician known for his fierce advocacy for the abolition of slavery and his role in the Reconstruction era.

Confederate States

refers to the 11 southern states that seceded from the Union in 1860-1861, leading to the American Civil War.

Reconstruction

Refers to the period following the Civil War in which the United States government focused on rebuilding the Southern states and reintegrating them into the Union.