# Question

The following data give the prices of seven textbooks randomly selected from a university bookstore.

a. Find the mean for these data. Calculate the deviations of the data values from the mean. Is the sum of these deviations zero?

b. Calculate the range, variance, and standard deviation.

a. Find the mean for these data. Calculate the deviations of the data values from the mean. Is the sum of these deviations zero?

b. Calculate the range, variance, and standard deviation.

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