zine and the percentage of the magazine space that contains advertisements. The data collected for eight magazines are given in the following table. Here price is the dependent variable. Percentage containing ads 35 42 60 49 65 25 63 30 Price ($) 5.50 6.95 4.95 5.75 3.95 8.25 5.50 6.75 a. Find the standard deviation of errors. Round your answer to two decimal places. Se = i b. Compute the coefficient of determination. What percentage of the variation in price is explained by the least squares regression of price on the percentage of magazine space containing ads? What percentage of this variation is not explained? Round your answer for r2 to two decimal places, and your answers for the percentages to the nearest integer. 2 = i i % is explained by the least squares regression. i % is not explained by the least squares regression.