For a given bivariate data set, the sample correlation coefficient was found to be close to...
For a given bivariate data set, the sample correlation coefficient was found to be close to 1. Which of these is (reasonably) valid?
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x and y are independent |
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y can be predicted using x |
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x causes y |
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y causes x |
Homework Answers
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For a given bivariate data set, the sample correlation
coefficient was found to be close to...
1. Compute r, the correlation coefficient for the following set of bivariate data. Is this correlation...
1. Compute r, the correlation coefficient for the following set of bivariate data. Is this correlation significant? (Use = 0.05). x 1 2 3 4 5 y 2 3 6 8 9 2. Hello, For my own reference can you also explain how one goes about solving? Thanks!
Please compute the covariance and correlation coefficient for the bivariate sample data sets below, and graph...
Please compute the covariance and correlation coefficient for
the bivariate sample data sets below, and graph the X, Y data.
2 9 53151 2 10 | 23456789
Please compute the covariance and correlation coefficient for the bivariate sample data sets below, and graph...
Please compute the covariance and correlation coefficient for
the bivariate sample data sets below, and graph the X, Y data.
2 -277 13-4-21-4 2 5315 2 8971 I 23456789 10
Please compute the covariance and correlation coefficient for the bivariate sample data sets below, and graph...
Please compute the covariance and correlation coefficient for
the bivariate sample data sets below, and graph the X, Y data.
YrYm (Xi-Xm),(Yi-Ym) XrXm Obsn 4 -6 12 -15 18 10 10 Mean = Mean =
You run a regression analysis on a bivariate set of data ( n = 41 )....
You run a regression analysis on a bivariate set of data ( n =
41 ). With ¯ x = 41.6 and ¯ y = 31.1 , you obtain the regression
equation y = − 2.748 x + 61.522 with a correlation coefficient of r
= − 0.011 . You want to predict what value (on average) for the
response variable will be obtained from a value of 10 as the
explanatory variable. What is the predicted response value?
You...
A) B) C) Based on the data shown below, calculate the correlation coefficient to three decimal...
A)
B)
C)
Based on the data shown below, calculate the correlation coefficient to three decimal places) 19.59 16.71 114.53 7 13.14 11.85 11.17 13 849 7.3 Here is a bivariate data set. 38.7 91.5 25. 6 993 572 36. 4 854 293 218 83.7 Find the correlation coefficient and report it accurate to three decimal places. What proportion of the variation in y can be explained by the variation in the values of x? Report answer as a percentage...
4. Heights of Presidents and Runners-Up data set: determine correlation coefficient r, determine of the correlation...
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...
Name: Instructor Date: Section 6. The regression line equation for a set of data is given...
Name: Instructor Date: Section 6. The regression line equation for a set of data is given by y-23x+. -10. The value of for this same data set is 10.1. Use α .05 a. If the lincar correlation coefficient for this data is -521, what is the best y -value for x 57 b. If the linear correlation coefficient for this data is r 972, what is the best predicted y-value for x=5? size n 15 with a 01 7. What...
ou run a regression analysis on a bivariate set of data(n=65n=65). You obtain the regression...
ou run a regression analysis on a bivariate set of data (n=65n=65). You obtain the regression equationy=−1.915x+−54.061y=-1.915x+-54.061with a correlation coefficient of r=−0.626r=-0.626 (which is significant at α=0.01α=0.01). You want to predict what value (on average) for the explanatory variable will give you a value of 30 on the response variable.What is the predicted explanatory value?x = _______
You run a regression analysis on a bivariate set of data (n = 40). With 7...
You run a regression analysis on a bivariate set of data (n = 40). With 7 = 54.4 and y = 25.7, you obtain the regression equation y = 1.034x + 54.019 with a correlation coefficient of r = 0.628. You want to predict what value (on average) for the response variable will be obtained from a value of 40 Is the explanatory variable. What is the predicted response value? y -
Please compute the covariance and correlation coefficient for
the bivariate sample data sets below, and graph the X, Y data.
2 9 53151 2 10 | 23456789
Please compute the covariance and correlation coefficient for
the bivariate sample data sets below, and graph the X, Y data.
2 -277 13-4-21-4 2 5315 2 8971 I 23456789 10
Please compute the covariance and correlation coefficient for
the bivariate sample data sets below, and graph the X, Y data.
YrYm (Xi-Xm),(Yi-Ym) XrXm Obsn 4 -6 12 -15 18 10 10 Mean = Mean =
You run a regression analysis on a bivariate set of data ( n =
41 ). With ¯ x = 41.6 and ¯ y = 31.1 , you obtain the regression
equation y = − 2.748 x + 61.522 with a correlation coefficient of r
= − 0.011 . You want to predict what value (on average) for the
response variable will be obtained from a value of 10 as the
explanatory variable. What is the predicted response value?
You...
A)
B)
C)
Based on the data shown below, calculate the correlation coefficient to three decimal places) 19.59 16.71 114.53 7 13.14 11.85 11.17 13 849 7.3 Here is a bivariate data set. 38.7 91.5 25. 6 993 572 36. 4 854 293 218 83.7 Find the correlation coefficient and report it accurate to three decimal places. What proportion of the variation in y can be explained by the variation in the values of x? Report answer as a percentage...
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...
Name: Instructor Date: Section 6. The regression line equation for a set of data is given by y-23x+. -10. The value of for this same data set is 10.1. Use α .05 a. If the lincar correlation coefficient for this data is -521, what is the best y -value for x 57 b. If the linear correlation coefficient for this data is r 972, what is the best predicted y-value for x=5? size n 15 with a 01 7. What...
You run a regression analysis on a bivariate set of data (n = 40). With 7 = 54.4 and y = 25.7, you obtain the regression equation y = 1.034x + 54.019 with a correlation coefficient of r = 0.628. You want to predict what value (on average) for the response variable will be obtained from a value of 40 Is the explanatory variable. What is the predicted response value? y -
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