of Data 3 www.4399.com/flash/11855 2. The following set of data relates mean word length and recommended age level for a set of children's books. Recommended Mean Word Age Length 4 3.4 6 5.6 5 4.8 6 5.3 7 5.1 9 6.8 8 6.0 5.3 6.6 a. Calculate the correlation coefficient (to two decimal places) using the table and classify the correlation. [5K, 1C] b. Use the method of least squares/linear regression to determine the equation of the line of best fit. Round all numerical values to two decimal places. [5A] c. Use this model to predict the average word length in a book recommended for 12-year-olds. Is this interpolation or extrapolation? Explain. [2T, 2C]