Could you answer 1-4? i have the chart data in picture 2

4. is no longer cut off :)

Due: See Calendar on Blackboard Objective: To calculate correlation r and learn to do regression analysis of linear data Materials: Excel or other spreadsheet software Instructions: Answer the questions below. Questions: 1. How does fuel consumption of a car change as its speed increases? Here' are data for a British Ford Escort. Speed is measured in kilometers per hour, and fuel consumption is measured in liters of gasoline used per 100 kilometers traveled. a. Make a scatterplot. Which variable should be on the horizontal axis? b. Describe the form of the relationship. In what way is it not linear? Explain why the form of the relationship makes sense. Hint: think of gasoline engine performances at varying speeds. c. It does not make sense to describe the variables as either positively associated or negatively associated. Why not? Note that the absence of negative values does not mean it won't have a negative association d. Is the relationship reasonably strong quite weak? Explain your answer. 2. Calculate the correlation r of the data above. Explain why r is close to zero despite a strong relationship between speed and gas used. Note that r and Rare not the same value. 3. Now transform the data so that speed is measured in miles per hour and fuel consumption in gallons per mile (1.609 kilometers - 1 mile and 3.785 liters - 1 gallon). Make a scatterplot and find the correlation for the transformed data. How did the change of units affect your results? . 4. Now express fuel consumption in miles per gallon such that each value is 1/x if x is gallons per mile. of units offert wir rechts? D E F G H Fuel used (L/100 km) 1 25 . 20 15 B Speed (kn Fuel used (4/100 km) 10 21 20 13 30 10 40 8 5 50 7 7 60 5.9 8 70 6.3 9 80 6.95 10 90 7.57 100 8.27 12 110 9.03 13 120 9.87 14 130 10.79 15 140 11.77 16 150 12.83 17 fuel used 10 5 O 20 40 60 80 100 120 140 160 speed a, horizontal axis should be speed b. 19 20 as either positively associated or nega associated. Why not? Note that the absence of negative values does not mean it won't a negative association d. Is the relationship reasonably strong quite weak? Explain your answer. 2. Calculate the correlation of the data above. Explain why r is close to zero despite a strong relationship between speed and gas used. Note that rand Rare not the same value. 3. Now transform the data so that speed is measured in miles per hour and fuel consumption in gallons per mile (1.609 kilometers 1 mile and 3.785 liters - 1 gallon). Make a scatterplot and fine the correlation for the transformed data. How did the change of units affect your results? 4. Now express fuel consumption in miles per gallon such that each value is 1/x if x is gallons per mile Again make a scatterplot and find the correlation. How did this change of units affect your results? 5. How fast do icicles grow? Japanese researchers measured the growth of icicles in a cold under various conditions of temperature wind Due: See Calendar on Blackboard Objective: To calculate correlation r and learn to do regression analysis of linear data Materials: Excel or other spreadsheet software Instructions: Answer the questions below. Questions: 1. How does fuel consumption of a car change as its speed increases? Here' are data for a British Ford Escort. Speed is measured in kilometers per hour, and fuel consumption is measured in liters of gasoline used per 100 kilometers traveled. a. Make a scatterplot. Which variable should be on the horizontal axis? b. Describe the form of the relationship. In what way is it not linear? Explain why the form of the relationship makes sense. Hint: think of gasoline engine performances at varying speeds. c. It does not make sense to describe the variables as either positively associated or negatively associated. Why not? Note that the absence of negative values does not mean it won't have a negative association d. Is the relationship reasonably strong quite weak? Explain your answer. 2. Calculate the correlation r of the data above. Explain why r is close to zero despite a strong relationship between speed and gas used. Note that r and Rare not the same value. 3. Now transform the data so that speed is measured in miles per hour and fuel consumption in gallons per mile (1.609 kilometers - 1 mile and 3.785 liters - 1 gallon). Make a scatterplot and find the correlation for the transformed data. How did the change of units affect your results? . 4. Now express fuel consumption in miles per gallon such that each value is 1/x if x is gallons per mile. of units offert wir rechts? D E F G H Fuel used (L/100 km) 1 25 . 20 15 B Speed (kn Fuel used (4/100 km) 10 21 20 13 30 10 40 8 5 50 7 7 60 5.9 8 70 6.3 9 80 6.95 10 90 7.57 100 8.27 12 110 9.03 13 120 9.87 14 130 10.79 15 140 11.77 16 150 12.83 17 fuel used 10 5 O 20 40 60 80 100 120 140 160 speed a, horizontal axis should be speed b. 19 20 as either positively associated or nega associated. Why not? Note that the absence of negative values does not mean it won't a negative association d. Is the relationship reasonably strong quite weak? Explain your answer. 2. Calculate the correlation of the data above. Explain why r is close to zero despite a strong relationship between speed and gas used. Note that rand Rare not the same value. 3. Now transform the data so that speed is measured in miles per hour and fuel consumption in gallons per mile (1.609 kilometers 1 mile and 3.785 liters - 1 gallon). Make a scatterplot and fine the correlation for the transformed data. How did the change of units affect your results? 4. Now express fuel consumption in miles per gallon such that each value is 1/x if x is gallons per mile Again make a scatterplot and find the correlation. How did this change of units affect your results? 5. How fast do icicles grow? Japanese researchers measured the growth of icicles in a cold under various conditions of temperature wind