6. For each of the following cases, give the size of the sample r required for statistical significance:

(a) n ¼ 5, a ¼ :05, one-tailed test

(b) n ¼ 24, a ¼ :05, two-tailed test

(c) n ¼ 42, a ¼ :01, two-tailed test

(d) n ¼ 125, a ¼ :05, two-tailed test

(e) n ¼ 1500, a ¼ :05, one-tailed test

(f) n ¼ 3, a ¼ :01, two-tailed test