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

$89

$173

$105

$112

$53

$159

$149

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 $173 = $

Sum of these deviations = $

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

Range = $

Variance =

Standard deviation = $