8. If X is X293): nd the following: (a) H1435 15) (c) P(|X 6|

8. If X is X2(23), find the following: (a) P(14.85 < X < 32.01). (b) The mean and variance of X. (c) x05(23) and x95(23) (d) The constants a and b such that P(a < X < b) = 0.95 and < a) = 0.025 9. If X N(6, 25), find (a) < X < 14) (b) > 15) (c) P(IX 61 < 15) (d) pox - 61 < 5)