The following data give the prices of seven textbooks randomly selected from a university bookstore. $87 $175 $102 $126 $55 $160 $142 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 = $ 121 Deviation from the mean for $175 = $ 54 Sum of these deviations = $ b. Calculate the range, variance, and standard deviation. [Round your answers to 2 decimal places.] Range = $ 120 Variance = i ! Standard deviation = $ i Save for Later Attempts: 1 of 2 used Submit