Answer Happy

15. [-13 Points] DETAILS DEVORESTAT9 12.SE.502.XP. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 13 18 33 The accompanying data was read from a graph. The independent variable is so, deposition rate (mg/m²/d) and the dependent variable is steel weight loss (g/m2). 43 45 111 y270 350 470 500 560 1150 (a) Construct a scatter plot. y 1200 1200 1000 1000 800 800 600 600 400 400 200 200 20 40 60 80 100 120 20 40 60 80 100 120 1200 1200 1000 1000 800 800 600 600 400 400 200 200 LLLLLX 20 40 60 80 100 120 20 40 60 80 100 120 Does the simple linear regression model appear to be reasonable in this situation? Yes, the scatter plot shows a reasonable linear relationship. O No, the scatter plot does not show a reasonable linear relationship. (b) Calculate the equation of estimated regression line. (Round all numerical values to two decimal places.) y = (c) What percentage of observed variation in steel weight loss can be attributed to the model relationship in combination with variation in deposition rate? (Round your answer to one decimal place.) (d) Because the largest x value in the sample greatly exceeds the others, this observation may have been very influential in determining the equation of the line. Delete this observation and recalculate the equation. (Round all numerical values to two decimal places.) Does the new equation appear to differ substantially from the original one (you might consider predicted values)? O Yes, there are significant differences. O No, there are not significant differences.