A team of scientists want to determine if students who take a new drug will have higher scores on the GRE (graduate record exam), which is the standardized test students take to get into graduate school, than students who do not take the drug. The mean score on the GRE in the population is 150 ().You collected the GRE scores of 15 students and found the mean score of your sample was 152 (x) (s = 1.32).

Is this a one- or two-tailed test?

What is the null hypothesis?

What is the alternative hypothesis?