While writing an article on the high cost of college

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Reference no: EM13615196

While writing an article on the high cost of college education, a reporter took a random sample of the cost of new textbooks for a semester. The random variable x is the cost of one book. Her sample data can be summarized by the following. (Give your answers correct to two decimal places.) n = 30, Î£x = 3594.6, and Î£(x - x)2 = 9778.4

(a) Find the sample mean, x.

(b) Find the sample standard deviation, s.

Lower Limit

Upper Limit

Reference no: EM13615196

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