4.3

7. Suppose a doctor measures the height, x, and head circumference, y, of 8 children and obtains the data below. The correlation coefficient is 0.964 and the least squares regression line is y = 0.166x + 12.909. Complete parts a and b below. Height, x 27.00 25.50 26.00 25.00 27.50 26.25 26.25 27.25 Head Circumference, y 17.4 17.1 17.2 17.1 17.5 17.3 17.2 17.4 (a) Compute the coefficient of determination, R2. R2 = % (Round to one decimal place as needed.) (b) Interpret the coefficient of determination. % of the variation in (1). is explained by the least-squares regression model. (Round to one decimal place as needed.) (1) O height O head circumference