More basic concepts. For each of the following, answer the question and give a short explanation of your reasoning.
(a) A significance test for comparing two means gave t = -2.18 with 10 degrees of freedom. Can you reject the null hypothesis that the μ's are equal versus the two-sided alternative at the 5% significance level?
(b) Answer part (a) for the one-sided alternative that the difference in means is negative.