3025NeSolutien201510WebAssign. Graphing ToolVerify that Ex = 155, Ex2 - 3835, Ey - 244, Ey2 = 9590, and Exy - 6021.Compute r. (Round your answer to four decimal places.)The data in part (a) represent average annual hours lost per person and average annual gallons of fuel wasted per person intraffic delays. Suppose that instead of using average data for different cities, you selected one person at random from each cityand measured the annual number of hours lost x for that person and the annual gallons of fuel wasted y for the same person.x (hr)22 4 22 40 16 25 2 38Y (gal) 618 15 52 21 31 4 72(b) Compute x and y for both sets of data pairs and compare the averages. (Round your answers to four decimal places.)Data 1Data 2Compute the sample standard deviations s, and s, for both sets of data pairs and compare the standard deviations.(Round your answers to four decimal places.)Data 1Data 2In which set are the standard deviations for x and y larger?O The standard deviations for x and y are larger for the first set of data.O The standard deviations for x and y are larger for the second set of data.O The standard deviations for x and y are the same for both sets of data.Look at the defining formula for r. Why do smaller standard deviations s, and s, tend to increase the value of r?O Multiplying by smaller numbers results in a larger value.O Dividing by smaller numbers results in a larger value.Dividing by smaller numbers results in a smaller value.O Multiplying by smaller numbers results in a smaller value.(c) Make a scatter diagram for the second set of data pairs.Graph LayersAfter you add an object to the graph youcan use Graph Layers to view and edit itsproperties.60464036NeSolutien3025201640HelpWebAssign. Graphing ToolVerify that Ex = 169, Ex? - 4913, Ey - 264, Ey2 - 13,316, and Exy - 7639.Compute r. (Round your answer to four decimal places.)(d) Compare r from part (a) with r from part (b). Do the data for averages have a higher correlation coefficient than thedata for individual measurements?O Yes, the data for averages have a higher correlation coefficient than the data for individual measurements.O No, the data for averages do not have a higher correlation coefficient than the data for individual measurements.List some reasons why you think hours lost per individual and fuel wasted per individual might vary more than the samequantities averaged over all the people in a city. Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time wasted and fuel wasted. Let xrepresent the average annual hours per person spent in traffic delays and let y represent the average annual gallons of fuelwasted per person in traffic delays. A random sample of eight cities showed the following data.x (hr) 2621 3818 24 18 535 36 28 9Y (gal) 47 3 3155A USE SALT(a) Draw a scatter diagram for the data.Graph LayersAfter you add an object to the graph youcan use Graph Layers to view and edit itsproperties45Fll40363025Solutien2045101520WebAssign. Graphing ToolVerify that Ex = 155, Ex? - 3835, Ey = 244, Ey? - 9590, and Exy = 6021.Compute r. (Round your answer to four decimal places.)The data in part (a) represent average annual hours lost per person and average annual gallons of fuel wasted per person intraffic delays. Suppose that instead of using average data for different cities, you selected one person at random from each cityand measured the annual number of hours lost x for that person and the annual gallons of fuel wasted y for the same person.16 25 2 38x (hr) 22Ly (gal) 614 22408 1552 21 31 4 72(b) Compute x and y for both sets of data pairs and compare the averages. (Round your answers to four decimal places.)Data 1Data 2Compute the sample standard deviations s, and sy for both sets of data pairs and compare the standard deviations.(Round your answers to four decimal places.)SyData 1Data 2In which set are the standard deviations for x and y larger?O The standard deviations for x and y are larger for the first set of data.O The standard deviations for x and y are larger for the second set of data.OThe standard deviations for x and y are the same for both sets of data.Look at the defining formula for r. Why do smaller standard deviations s, and s, tend to increase the value of r?O Multiplying by smaller numbers results in a larger value.O Dividing by smaller numbers results in a larger value.O Dividing by smaller numbers results in a smaller value.Multiplying by smaller numbers results in a smaller value.(c) Make a scatter diagram for the second set of data pairsGraph LayersAfter you add an object to the graph youcan use Graph Layers to view and edit itsproperties.6045403530Saleenolution2s2046102025303640NO>•

Name: 3025NeSolutien201510WebAssign. Graphing ToolVerify that Ex = 155, Ex2
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Description: 3025NeSolutien201510WebAssign. Graphing ToolVerify that Ex = 155, Ex2 - 3835, Ey - 244, Ey2 = 9590, and Exy - 6021.Compute r. (Round your answer to four decimal places.)The data in part (a) represent average annual hours lost per person and average