Continuous R.V. Pistribution. X has infinite possible ontiome =0 D. P(X=K) -0. 2).只有取一个范围才 有根无率 Special distributions for Continuous R.V. 1) uniform distribution. area=1. a kr 云记 proportion area probability perientage/ percentile PCK,≤x≤1) K2-K b-a- b-a. E(X)= bu 2 Std (x) = b_a =(X)P+S - dcz 2) normal distribution. 有其它,求area.用normalcdf. 有avea,求其它,用inu Norm. •