A particular normally distributed population has a mean of 40 and a standard deviation of 6. For each sample below, use a z test and indicate if it shows a significant result (α = .05, onetailed): (a) sample of N = 10 with = 44 (b) sample of N = 1 with = 48 (c) sample of N = 81 with = 42 (d) sample of N = 16 with = 42?