The Following Data Give The Prices Of Seven Textbooks Randomly Selected From A U

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

Mean = $

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Deviation from the mean for $174 = $

Sum of these deviations = $

b. Calculate the range, variance, and standard deviation. [Round your answers to 2 decimal places.]

Range = $

Variance =

Standard deviation = $