Below are four bivariate data sets and the scatter plot for each. (Note that each scatter plot is displayed on the same scale.) Each data set is made up of sample values drawn from a population. y V 1.0 8.1 11 1.0 8.1 2.0 6.9 10+ 10- 9- 2.0 | 5.3 3.0 8.1 8- 3.0 9.9 4.0 6.1 6- 4.0 6.4 64 54 5.0 6.8 5.0 2.0 6.0 4.3 34 2+ 6.0 5.1 3 24 7.0 5.2 7.0 9.4 8.0 3.3 S010 11 8.0 4.0 6.089 1031 9.0 3.8 9.0 9.7 Figure 1 Figure 2 10.0 3.4 10.0 6.8 m 11 10- 1.0 10.0 14 10 1.0 4.0 2.0 5.8 2.0 9.0 3.0 7.1 3.0 8.0 4.0 4.5 64 4.0 7.0 5.0 5.1 5.0 6.0 6.0 6.0 5.0 7.4 7.0 5.5 7,0 4,0 8.0 | 6.5 8.0 3.0 9.0 9.5 9.0 2.0 Figure 4 Figure 3 10.0 8.0 10.0 1.0 oloo oO Ooo Oo O CORRELATION AND SIMPLE LINEAR REGRESSION Emmanuel v Linear relationship and the sample correlation coefficient 1.0 10.0 11 1.0 4.0 11 10 x 10+ 2.0 9.0 2.0 5.8 9- 3.0 8- 3.0 7.1 7+ 6- 5- 4.0 7.0 4.0 4.5 5+ 4 x 5.0 6.0 5.0 5.1 Aa 6.0 5.0 3+ 6.0 7.4 2- 7.0 4.0 7.0 5.5 +++ 5 6 78 9 10 11 8.0 3.0 8.0 6.5 1 2 34 1 2 3 4 5678 9 10 11 9.0 2.0 9.0 9.5 Figure 4 Figure 3 10.0 1.0 10.0 8.0 Answer the following questions about the relationships between pairs of variables and the values of r, the sample correlation coefficient. The same response may be the correct answer for more than one question. 1. Which data set has an apparent positive, but not perfect, linear relationship between its two variables? Choose one 2. For which data set is the sample correlation coefficient r equal to 1? Choose one 3. For which data set is the sample correlation coefficient r closest to 0? Choose one 4. Which data set indicates the strongest positive linear relationship between its two variables? Choose one Explanation Check 2020 McGraw-Hill Education, All Rights Reserved. Terms of Use Privacy | Accessibility here to search, 21 |