For each of the following studies, say whether you would use a t test for depend
ID: 3290416 • Letter: F
Question
For each of the following studies, say whether you would use a t test for dependent means or a t test for independent means. (a) A researcher measures the height of 40 university student who are the first-born in their families and compares the 15 who come from large families to the 25 who come from smaller families. (b) A researcher tests performance on a math skills test of each 250 individuals before and after they complete a one-day seminar on managing test anxiety. (c) A researcher compares the resting heart rate of 15 individuals who have been taking a particular drug to the resting heart rate of 48 other individuals who have not been taking this drug.Explanation / Answer
a) Ans: t-test for independent means because the 15 observation from large families does not depend on the 25 observation from smaller families.
b) Ans: t-test for dependence means because the skill of student after seminar depends on his or her before skill.
c) Ans: t-test for independence means because taking particular drug sample is not dependent on the those who have not been taking this drug.
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