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What method would you use to investigate the following research hypotheses? a

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What method would you use to investigate the following research hypotheses?

a. High school students who work during the school year will have lower grades and lower standardized test scores than students who do not work.

b. First-grade students who are taught reading using phonics will read at a higher level than fi rst-grade students taught by another method.

c. Beginning teachers who are mentored will be more effective and express more satisfaction with teaching than beginning teachers who are not mentored.

d. Students who are in small classes (less than 15) in grades kindergarten to 3 will perform at a higher level in grades 4 to 6 than will students in regular-sized classes (more than 20)