A memory-boosting pill is being tested to see if it is effective. Twenty college students are randomly assigned to two groups. Group A includes 10 students who receive the memory-boosting pill while Group B includes 10 students who receive a placebo. Each student is instructed to take the pill every morning when he or she wakes up for a month. The average score on a memory test for Group A is 10, with a standard deviation of 2.3. The average memory test score for Group B is 6, with a standard deviation of 3. What test would be most appropriate to determine whether the pill was effective?
a. Independent-samples t-test
b. Correlation
c. Linear regression
d. Multiple linear regression
Ans: A
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