pter 03, Section 3.2, Problem 033 The following data give the prices of seven textbooks randomly selected from a university bookstore. $92 $174 $109 $122 $51 $158 $141 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 = $ 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 = $