Stats homework

LAB 4 (NORMAL DISTRIBUTION AND SAMPLING) Standard Normal Variable 1) Let Z = N(0,1) be the standard normal variable a) Calculate the area to the left of z = 2. 25 b) Calculate the probability P(X > -1,89) c) Calcualte the proabilility P(X > 4) and P(X > -3.8) d) Calculate the area between z = -1.25 and z = 1. 35 e) Find the z - score for which the area to the left is .975 f) Find the z-score for which the area to the right is .05 g) Find the 40th percentile h) Find the interquartile range 2) quantile z, is defined as the z- score for which the area to its right is ox Find zas and 2023General Normal Variables 1) Let X =N (50, 10)..which means normal with mean 50 and standard deviation 10 a) Draw the Normal Curve b) Calculate the area between 30 and 60 c) P(X > 40) d) P(30