The accompanying data was read from a graph. The independent variable is SO2 deposition rate (mg/m²/d) and the dependent variable is steel weight loss (g/m²). x 15 18 31 43 45 112 y 250 350 470 500 560 1170 (a) Construct a scatter plot. y 1200 1000 800 600 400 200 O y 1200 1000 800 600 400 200 20 40 60 20 40 60 80 100 120 80 100 120 X X y 1200 1000 800 x 600 400 200 y 1200 1000 800 600 400 200 20 40 20 40 60 60 80 100 120 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. No, the scatter plot does not show a reasonable linear relationship. X X (b) Calculate the equation of the 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.) y* = Does the new equation appear to differ substantially from the original one (you might consider predicted values)? o Yes, there are significant differences. No, there are not significant differences.
The accompanying data was read from a graph. The independent variable is SO2 deposition rate (mg/m²/d) and the dependent variable is steel weight loss (g/m²). x 15 18 31 43 45 112 y 250 350 470 500 560 1170 (a) Construct a scatter plot. y 1200 1000 800 600 400 200 O y 1200 1000 800 600 400 200 20 40 60 20 40 60 80 100 120 80 100 120 X X y 1200 1000 800 x 600 400 200 y 1200 1000 800 600 400 200 20 40 20 40 60 60 80 100 120 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. No, the scatter plot does not show a reasonable linear relationship. X X (b) Calculate the equation of the 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.) y* = Does the new equation appear to differ substantially from the original one (you might consider predicted values)? o Yes, there are significant differences. No, there are not significant differences.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:The accompanying data was read from a graph. The independent variable is SO2 deposition rate (mg/m²/d) and the dependent variable is steel weight loss (g/m²).
15 18
31 43 45 112
y 250 350 470 500 560 1170
X
(a) Construct a scatter plot.
y
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Does the simple linear regression model appear to be reasonable in this situation?
o Yes, the scatter plot shows a reasonable linear relationship.
No, the scatter plot does not show a reasonable linear relationship.
100 120
X
X
(b) Calculate the equation of the 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.)
y* =
Does the new equation appear to differ substantially from the original one (you might consider predicted values)?
o Yes, there are significant differences.
No, there are not significant differences.
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