The mean number of close friends for the population freshman college students in the U.S.A. is = 5.7. The standard deviation of scores in this population is = 1.3. A psychologist predicts that the mean number of close friends for freshman introverts will be significantly different from the mean of the population. The mean number of close friends for a random sample of 25 freshman introverts is M = 6.5. Set your alpha level at a = .05. Complete steps 3 and 4 of the hypothesis testing procedure. Then summarize the results of the hypothesis testing procedure by putting your results in journal form. Ignore the minus sign if your calculated z or t is negative. [Note, if your calculated z or t is not identical to one of the values below, but within plus or minus 0.2 of an answer below, assume it's a rounding error and select the answer that is closest to your calculated value.] = t (25) 19.00, p < .05 z = 2.14, p > .05 Ot (25) 4.61, p < .01 t (24) 4.61, p < .05 z (25) = 3.08, p < .01 = Oz 3.08, p < .05