4. The radius of a sphere is a discrete random variable with pmf given by: PR()1,2,3...

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4. The radius of a sphere is a discrete random variable with pmf given by: PR()1,2,3 0 otherwise (a) Find k (b) Find the mean of the VOLUME of the sphere (c) Find the variance of the VOLUME of the sphere. (d) Find the mean and the variance of the sample mean of an iid sample contag six spheres.

math Statistics-And-Probability

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