Social Studies, 12.09.2019 01:30, serianmollel

Aresearcher administers a standardized test to the students in a school testing a new program as well as to students in a similar school as a control group. to what extent is comparison of the average scores for the two groups of students useful for determining the effects of the program? a. not at all useful, as it is not a true experimental design b. of limited usefulness as a pilot study but has many threats to validity c. very useful, as the similarity of the schools eliminates threats to validity d. a statistical regression is needed to determine its usefulness

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