Please help with my statistics assignment. Much thanks guys .

30. Which hypothesis test has the greatest power? a. r2 = 0.9 & n = 30 b. 12 = 0.9 & n = 300 c. r2 = 0.5 & n = 30 d. r2 = 0.5 & n = 300 31. In a normal distribution, what z-score cuts off the bottom 18% of the distribution? a. z = 0.91 b. z= -0.91 C. Z = 0.43 d. z=-0.43 32. In a normal distribution, what z-score cuts off the top 65% of the distribution? a. z = 0.7422 b. z = 0.2578 C. Z =0.39 . z= -0.39 33. For a normal distribution with a mean of u = 80 and a standard deviation of o = 10, what is p(X92)? a. p = .7881 b. p =.6954 p =.2119 d. P =.2881 35. For a normal distribution with a mean of u = 10 and a standard deviation of o = 2, what is p(5 .01 t(.8128) = 7.0, p = a, tobt = 4.25 d. t(10), tcrit > 5.3, p