Let X and Y be two random variables, denoting age and weight, respectively.Consider a random sample of size n = 20 from these two variablesX = (69,74,68,70,72,67,66,70, 76,68,72,79,74,67,66,71,74,75,75,76)Y = (153,175,155,135,172,150,115,137,200,130,140, 265,185,112,140,150,165,185,210,220)(a) Find the mean, median, and mode for X.(b) What is the variance for Y?(c) Plot the normal distribution for X.(d) What is the probability of observing an age of 80 or higher?(e) Find the 2-dimensional mean and the covariance matrix for these two variables.(f) What is the correlation between age and weight?
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Posted 14 Sep 2017 03:09 PM
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