Let X: Chi-square with degrees of freedom r = 10, then | = a) P (X> 3.94) | = b) P (X <2.56) = c) P (18.31 c) = 0.025, then = e) The 10th percentile of X is P10 0.055 0.95 || 0.955 | 0.945 0.01 0.045 0.99 0.05 20.483 3.816 15.987 4.865