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Question;81.;A statistician wishes to examine the relationship between average monthly;rainfall (in mm), x, and number of road accidents, y, in a particular;city. The following calculations have;been done for you:?x = 265,?x2 = 6982,?y = 193,?y2 = 3421,?xy = 4842 and n = 12. The coefficient of correlation between;average monthly rainfall and number of road accidents is;a.;0.899;b.;0.969;c.;0.974;d.;0.977;e.;1.000;82.;A statistician wishes to examine the relationship between average monthly;rainfall (in mm), x, and number of road accidents, y, in a particular;city. The following calculations have;been done for you:?x = 276,?x2 = 6888,?y = 193,?y2 = 3421,?xy = 4842 and n = 12. The coefficient of correlation between;average monthly rainfall and number of road accidents is;a.;0.899;b.;0.969;c.;0.974;d.;0.977;e.;1.000;83.;A statistician wishes to examine the relationship between average monthly;rainfall (in mm), x, and number of road accidents, y, in a particular;city. The following calculations have;been done for you:?x = 276,?x2 = 6982,?y = 185,?y2 = 3421,?xy = 4842 and n = 12. The coefficient of correlation between;average monthly rainfall and number of road accidents is;a.;0.899;b.;0.969;c.;0.974;d.;0.977;e.;1.000;84.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 7. The coefficient of correlation between x and;y is given by;a.;0.998;b.;0.999;c.;1.000;d.;0.945;e. 0.922;85.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 8. The coefficient of correlation between x and;y is given by;a.;0.998;b.;0.999;c.;1.000;d.;0.945;e. 0.922;86.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 9. The coefficient of correlation between x and;y is given by;a.;0.998;b.;0.999;c.;1.000;d.;0.945;e. 0.922;87.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 10. The coefficient of correlation between x and;y is given by;a.;0.998;b.;0.999;c.;1.000;d.;0.945;e. 0.922;88.;You have been given a two-variable data set with the following calculations already;completed: ?x = 72,?x2 = 1544,?y = 37,?y2 = 305,?xy = 654 and n = 5. The coefficient of correlation between x and;y is given by;a.;0.963;b.;0.933;c.;0.941;d.;0.945;e. 0.922;89.;You have been given a two-variable data set with the following calculations;already completed: ?x = 72,?x2 = 1544,?y = 37,?y2 = 305,?xy = 654 and n = 10. The coefficient of correlation between x and;y is given by;a.;0.963;b.;0.933;c.;0.941;d.;0.945;e. 0.922;90.;You have been given a two-variable data set with the following calculations;already completed: ?x = 72,?x2 = 1544,?y = 37,?y2 = 305,?xy = 654 and n = 15. The coefficient of correlation between x and;y is given by;a.;0.963;b.;0.933;c.;0.941;d.;0.945;e. 0.922;91.;You have been given a two-variable data set with the following calculations;already completed: ?x = 72,?x2 = 1544,?y = 37,?y2 = 305,?xy = 654 and n = 20. The coefficient of correlation between x and;y is given by;a.;0.963;b.;0.933;c.;0.941;d.;0.945;e. 0.922;92. The marketing manager of a large supermarket chain;would like to determine the effect of shelf space (X) on the sales (Y);of pet food. A random sample of 12;equal-sized stores is selected. Some;calculations have been done for you: SSx = 375, SSy =;3.0025 and SSxy = 27.75. What;is the value of the covariance?;a. 2.52;b. 2.55;c. 2.64;d. 2.73;e.;2.31;93. The marketing manager of a large supermarket chain;would like to determine the effect of shelf space (X) on the sales (Y);of pet food. A random sample of 12;equal-sized stores is selected. Some;calculations have been done for you: SSx = 400, SSy =;3.0025 and SSxy = 28. What is;the value of the covariance?;a. 2.52;b. 2.55;c. 2.64;d. 2.73;e.;2.31;94. The marketing manager of a large supermarket chain;would like to determine the effect of shelf space (X) on the sales (Y);of pet food. A random sample of 12;equal-sized stores is selected. Some;calculations have been done for you: SSx = 375, SSy = 3.5;and SSxy = 29. What is the;value of the covariance?;a. 2.52;b. 2.55;c. 2.64;d. 2.73;e.;2.31;95. The marketing manager of a large supermarket chain;would like to determine the effect of shelf space (X) on the sales (Y);of pet food. A random sample of 12;equal-sized stores is selected. Some;calculations have been done for you: SSx = 375, SSy =;3.0025 and SSxy = 30. What is;the value of the covariance?;a. 2.52;b. 2.55;c. 2.64;d. 2.73;e.;2.31;96.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 7. The covariance between x and y is given by;a.;385.60;b.;973.29;c.;1289.07;d.;1456.91;e.;476.20;97.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 8. The covariance between x and y is given by;a.;385.60;b.;973.29;c.;1289.07;d.;1456.91;e.;476.20;98.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 9. The covariance between x and y is given by;a.;385.60;b.;973.29;c.;1289.07;d.;1456.91;e.;476.20;99.;You have been given a two-variable data set with the following calculations;already completed: ?x = 496,?x2 = 37306,?y = 508,?y2 = 39352,?xy = 38309 and n = 10. The covariance between x and y is given by;a.;385.60;b.;973.29;c.;1289.07;d.;1456.91;e.;476.20;100.;You have been given a two-variable data set with the following calculations;already completed: ?x = 72,?x2 = 1544,?y = 37,?y2 = 305,?xy = 654 and n = 5. The covariance between x and y is given by;a.;30.3;b.;43.1;c.;34.0;d.;27.4;e.;31.9

 

Paper#62450 | Written in 18-Jul-2015

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