9. The tensile strength of a certain type of paper is related to the amount of hardwood in the pulp. 10 samples of paper are produced and tested. The data are shown as below: Y(Strength) X(%Hardwood) 160 10 171 15 175 15 181 20 Y 182 20 184 20 188 25 193 25 195 28 200 30 The least squares linear regression model obtained is Y = 143.8+1.88X.Does the linear model adequately describe the data? Establish an ANOVA table and evaluate the adequacy of model using = 0.05 for your test. ()