Question

For samples of the specified size from the population described, find the mean and standard deviation of the sample mean.The National Weather Service keeps records of rainfall in valleys. Records indicate that in a certain valley, the annual rainfall has a mean of and a standard deviation of Suppose the rainfalls are sampled during randomly picked years, and is the mean amount of rain in these years. For samples of size 36, determine the mean and standard deviation of .

Answer 1

Solution :

Here , some data is missing in your question please check it

iam assuming the data to solving this problem it is useful to you.

Given that ,

mean = = 68

standard deviation = = 12

n = 36

mean of x = = 68

standard deviation of x = =  / n

= 12 / 36

= 2

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