# Question

5 . 5 - 2 . Let X be N(50, 36). Using the same set of axes, sketch the graphs of the probability density functions of

(a) X.

(b) , the mean of a random sample of size 9 from this distribution.

(c) , the mean of a random sample of size 36 from this distribution.

(a) X.

(b) , the mean of a random sample of size 9 from this distribution.

(c) , the mean of a random sample of size 36 from this distribution.

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