Question

A cognitive researcher wonders whether massed studying (studying all at once) or spaced studying leads to better test performance. He randomly selects 40 participants and, believing that IQ might be a confounding variable, matches participants on IQ scores and then divides the matched pairs into two groups. The first group studies the test material for 5 hours in one night, while the other group studies for 1 hour a night for 5 nights. All 40 people are then given on their performance. The test statistic that the researcher should use to test his hypothesis is:

Group of answer choices

Relative Risk

Chi-square

2-independent sample t-test

2-dependent sample t-test

Answer 1

A cognitive researcher wonders whether massed studying (studying all at once) or spaced studying leads to better test performance. He randomly selects 40 participants believing that IQ might be a confounding variable, matches participants on IQ scores and then divides the matched pairs into two groups. The first group studies the test material for 5 hours in one night, while the other group studies for 1 hour a night for 5 nights. All 40 people are then given on their performance. The test statistic that the researcher should use to test his hypothesis is

2-dependent sample t-test(ans)

As this is the procedure of paired t test...as they are dependent....(as we paired the data into groups)