A major research study concluded that the mean number of times adolescents had engaged in vandalism in the past 12 months was 6.3 times. We think that the true population average is higher than that. We collected our own sample (N=100, M=4.2, SD=1.20). Set your alpha level to 0.01. What is the research hypothesis (H1)? a. H1: > 6.3 b. H1: < 6.3 c. H1: > 4.2 d. H1: < 4.2 What type of test is used in the example given in question ? A non-directional test A one-tailed test A two-tailed test A critical region test