The following data give the prices of seven textbooks randomly selected from a university bookstore. $91 $174 $101 $128 $53 $158 $149 a. Find the...

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 = $