For Samples of the Specified Size from the Population Described $\overline { \mathbf { X } _ { * } }$

For samples of the specified size from the population described, find the mean and standard deviation of the samplemean $\overline { \mathbf { X } _ { * } }$
-The National Weather Service keeps records of rainfall in valleys. Records indicate that in a certain valley, the annual rainfall has a mean of 95 inches and a standard deviation of 12 inches. Suppose the rainfalls are sampled during randomly picked years and $\bar { x }$ is the mean amount of rain in these years. For samples of size 36 , determine the mean and standard deviation of $\bar { x }$ .

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