a. One set of 10 pairs of scores, X and Y values, produces a correlation of...
a. One set of 10 pairs of scores, X and Y values, produces a
correlation of r = 0.60. If SSY = 200, find the standard error of
estimate for the regression line.
b. A second set of 10 pairs of X and Y values produces a
correlation of r = 0.40. If SSY = 200, find the standard error of
estimate for the regression line.
Homework Answers
a) standard error of estimate =sqrt((1-r2)*SSY/(n-2))=sqrt((1-0.62)*200/8)=4
b)
standard error of estimate =sqrt((1-0.42)*200/8)=4.5826
Add Answer to:
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Question 7 0.5 pts A set of n = 4 pairs of scores (X and Y values) has SSX-5, SSY-625, and SSXY-50. The coefficient of determination (R2) for these data is__.. (Round your answer to two decimal places.)
Question 7 0.5 pts A set of n = 4 pairs of scores (X and Y values) has SSX-5, SSY-625, and SSXY-50. The coefficient of determination (R2) for these data is__.. (Round your answer to two decimal places.)
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True or false: 1) If X and Y are standardized, then fit a linear regression line...
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a. Using the pairs of values for all 10 points, find the equation of the regression...
a. Using the pairs of values for all 10 points, find the
equation of the regression line.
b. After removing the point with coordinates (7,1), use the
pairs of values for the remaining 9 points and find the equation of
the regression line.
c. Compare the results from parts (a) and (b).
a. What is the equation of the regression line for all 10
points?
y=___+___x (Round to three decimal places as needed.)
b. What is the equation of the...
correlation and regression 210 Statistics EXTRA CREDIT Correlation and Regression Formulas written Assignment 1. Follow the...
correlation and regression
210 Statistics EXTRA CREDIT Correlation and Regression Formulas written Assignment 1. Follow the instructions below to calculate the correlation coefficient and least squares regression line for the data set below. Z 22,- The sample means and sample standard deviations for the two variables are listed below: X = 4 x = 2 3 =5 Sy = 1 The linear correlation coefficient is = 52. Calculate this correlation coefficient using the steps below: (a) First, complete the columns...
a a. Using the pairs of values for all 10 points, find the equation of the...
a a. Using the pairs of values for all 10 points, find the equation of the regression line. b. After removing the point with coordinates (7.1), use the pairs of values for the remaining 9 points and find the equation of the regression line. c. Compare the results from parts (a) and (b). 10-1 ... 8-••• ... 6- 4- 22 0- 0 2 4 6 8 10 ATTITI to a. What is the equation of the regression line for all...
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A set of n=10 pairs of X and Y scores has SSx=14, SSy=84, and SP=28. What is the slope of the regression equation for these scores? Answer:
Question 7 0.5 pts A set of n = 4 pairs of scores (X and Y values) has SSX-5, SSY-625, and SSXY-50. The coefficient of determination (R2) for these data is__.. (Round your answer to two decimal places.)
Question 7 0.5 pts A set of n = 4 pairs of scores (X and Y values) has SSX-5, SSY-625, and SSXY-50. The coefficient of determination (R2) for these data is__.. (Round your answer to two decimal places.)
4. Heights of Presidents and Runners-Up data set: determine correlation coefficient r, determine of the correlation is significant. Winner 69.5 73 73 74 74.5 74.5 71 71 a correlation coefficient r = Runner-up 72 69.5 70 68 74 74 73 76 b. significant (yes or no)? 5. Casino Size and Revenue data set: determine correlation coefficient r, determine if the correlation is significant Size 160 227 140 144 161 147 141 a. correlation coefficient Revenue 189 157 140 127 123...
a. Using the pairs of values for all 10 points, find the equation of the regression line b. After removing the point with coordinates (1,2), use the pairs of values for the remaining 9 points and find the equation of the regression line. c. Compare the results from parts (a) and (b). -LL.... ONACO NO 4 6 8 10 a. What is the equation of the regression line for all 10 points? y = + x (Round to three decimal...
a. Using the pairs of values for all 10 points, find the
equation of the regression line.
b. After removing the point with coordinates (7,1), use the
pairs of values for the remaining 9 points and find the equation of
the regression line.
c. Compare the results from parts (a) and (b).
a. What is the equation of the regression line for all 10
points?
y=___+___x (Round to three decimal places as needed.)
b. What is the equation of the...
correlation and regression
210 Statistics EXTRA CREDIT Correlation and Regression Formulas written Assignment 1. Follow the instructions below to calculate the correlation coefficient and least squares regression line for the data set below. Z 22,- The sample means and sample standard deviations for the two variables are listed below: X = 4 x = 2 3 =5 Sy = 1 The linear correlation coefficient is = 52. Calculate this correlation coefficient using the steps below: (a) First, complete the columns...
a a. Using the pairs of values for all 10 points, find the equation of the regression line. b. After removing the point with coordinates (7.1), use the pairs of values for the remaining 9 points and find the equation of the regression line. c. Compare the results from parts (a) and (b). 10-1 ... 8-••• ... 6- 4- 22 0- 0 2 4 6 8 10 ATTITI to a. What is the equation of the regression line for all...
a. Using the pairs of values for all 10 points, find the equaton of the regression ine b. After removing the point with coordinates (1.3), use the pairs of values for the remaining 9 points and find the equation of the regression line c Compare the results rom parts (a) and (b) a. What is the equation of the regression line for all 10 points? (Round to three decimal places as needed) b, what is the equationofthe regression line tor...
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