Some students do homework with the TV on. Researchers wanted to see if people ca
ID: 3290457 • Letter: S
Question
Some students do homework with the TV on. Researchers wanted to see if people can work as effectively with as without distractions. From a group of studentvolunteers, researchers randomly assigned half to do a relatively easy crossword puzzle in a quiet room and the other half to do the same relatively easy crossword puzzle in a room in which MTV was on a TV. The time to complete the puzzle was recorded for each student. Which test is appropriate to use to determine if a difference exists in average time to complete the puzzle between those assigned to the quiet room and those assigned to the MTV room?
a. paired t-test
b. two sample t test
Explanation / Answer
The correct answer is b) two sample t test
because the sampling units (here students are samplin units) are not dependent. We select them randomly and so the two groups are independent each other. So we need to used here two sample t test.
The option a) is incorrect because for pair t test the data collect before and after on the same unit or related units (for example sibling) .
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