w i We use the form 9 = a + bx for the leastesquara line. in some computer printouts, the leastsquares equation is not given directly. or predictor variable is displayed. Sometimes a is referred to as the constant, and sometimes as the intercept. Data from a report 5 number oi frost-free days per year in a state. A Mlnltab printout provides the following information. and the coefficient b of the explanatory Instead, the value of the constant a is given, atlon (in thousands of feet) and average howed the following relationship between elev medicine: coat as cm: 1 12 Comm: sum 111.31 11.21 11.002 :12\"an 41.1\" 3.511 4.79 11.003 5 - 11.0603 Rsq - \".1\" lable x. [is coefcient is the slope b. "Constant" refers to a in the equation )7 = a + bx. NnBce that 'Elevation" is listed under \"Predictor." This means that elevation Is the explanatory var (a) Use the printout to write the least-squares equatlon. ' x i=1 + ,, (b) For each limo-foot increase in elevation, how many fewer frost-free days are predicted? (Round your answer to three decimal places.) of r? Be sure to give the correct sign for r based on the sign of [7. (Round your answer to four decimal places.) (c) The printout gives the value of the coefcient of determination r2. What is the value (d) What percentage of the variation in y can be explained by Hie corresponding variation in x and the least-squares line? \"In What percentage is unexplained? \"In Need Help? @ ASK YOURTEACHER PRACTICE ANOTHER i l l i 3. [/03 Points] BBUNDERSTAT1Z 9.2.006. gm of a child (in kilograms) and the metabolic rate of the child (in 100 kcai/ 24 hr). The following Minitab display gives information regarding the relationship between the body wei Radiator out 5! Coet w e Cmmt must p.41\" 2.115 0.34 weight 11.3"\" 0.0297: 13.52 moon 5 - 0.517508 RSq - 95.\" (a) Write out the least-squares equation. ? = , 4 7 x i e? [Use 5 decimal places.) i (b) For each 1 kilogram increase in weight, how much does the metabolic rate of a child increas (c) What is the value of the correlation coefcient r7 (Use 3 decimal places.) Need Help? @