5.5-2. Let x be N(75,64). Using the same set of axes, sketch the graphs of the probability density functions of
(a) x.
(b) ar{x} , the mean of a random sample of size 16 from this distribution.
(c) ar{x} , the mean of a random sample of size 36 from this distribution.
5.5-2. Let X be N(75, 64). Using the same set of axes sketch the graphs of the probability density functions of
(a) X. (b) X, the mean of a random sample of size 16 from this distribution.
(c) X, the mean of a random sample of size 36 from this distribution