Which of the following experiments uses independent samples? You want to compare

Question

Which of the following experiments uses independent samples? You want to compare the mean SAT score of a randomly selected group of students who took a new SAT preparation course to the national average SAT score. You want to compare the depression levels of teenage girls before and after attending a weeklong camp focused on improving self-image. So you compare the mean Hamilton depression scores of a randomly selected group of teenage girls before and after they attend a weeklong camp focused on improving self-image. You want to compare the mean first-month weight gain of premature babies to that of full-term babies. So you compare the mean first-month weight gain of a random sample of premature babies to the mean first-month weight gain of a random sample of full-term babies.

Explanation / Answer

You want to compare the mean first month weight gain of premature babies so that of full term babies so you compare the mean first month weight gain of random sample of premature babies to the mean first month weight gain of random sample of full term babies. In this case both the samples are independent.

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