The accompanying data was read from a graph. The independent variable is S02 dep

Question

The accompanying data was read from a graph. The independent variable is S02 deposition rate (mg/m2/d) and the dependent variable is steel weight loss (g/m2 15 18 32 43 45 110 y 260 350 470 500 560 1120 (a) Construct a scatter plot. 1200 1000 800 600 1200 1000 600 200 200 0 20 40 60 80 100 120 0 20 40 60 80 100 120 1200 1000 800 600 1200 1000 600 400 200 200E 0 20 40 60 80 100 120 0 20 40 60 80 100 120 Does the simple linear regression model appear to be reasonable in this situation? O 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 the estimated regression line. (Round all numerical values to two decimal places.) (c) What is the correlation coefficient r? (Round your answer to three decimal places.) (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.)

Explanation / Answer

Solution:-
a) option A.

=> Yes,the scatter plot shows a reasonable linear relationship.

b) y = 162.86 + 8.68x

c) r=0.9953

d) y* = 169.83 + 8.44x

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