Question

X ~ N(60, 9). Suppose that you form random samples of 25 from this distribution. Let ¯¯¯¯¯ X be the random variable of averages. Let ΣX be the random variable of sums. For parts c through f, sketch the graph, shade the region, label and scale the horizontal axis for ¯¯¯¯¯ X , and find the probability. Sketch the distributions of X and ¯¯¯¯¯ X on the same graph. ¯¯¯¯¯ X ~ _____(_____,_____) P( ¯¯¯ x < 60) = _____ Find the 30th percentile for the mean. P(56 < ¯¯¯ x < 62) = _____ P(18 < ¯¯¯ x < 58) = _____ NO graph or Scale Needed, Please show how to get answer in Excel

Answer 1