Homework Answers
1 no, scatter diagram is the correct one. From the given data, using calculator we can calculate the sample correlation and it has been found that r = - 0.91 that is highly negatively correlated. so the scatter plot given in the no.1 is the suitable one.
there is a negative correlation between Driving speed and fuel efficiency that is if we increase the speed fuel efficiency is decreases linearly.
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Check My Work A study on driving speed (miles per hour) and fuel efficiency (miles per...
those pictures are for the one question, please answer all of them. Thanks! A study on...
those pictures are for the one question, please answer all of
them. Thanks!
A study on driving speed (miles per hour) and fuel efficiency (miles per gallon) for midsize automobiles resulted in the following data Click on the datafile logo to reference the data DATA file Driving Speed Fuel Efficiency 30 50 40 55 30 25 60 25 50 55 28 25 25 23 30 32 21 35 26 25 a. Which of the following is a scatter diagram with...
A department of transportation’s study on driving speed and miles per gallon for midsize automobiles resulted...
A department of transportation’s study on driving speed and miles per gallon for midsize automobiles resulted in the following data: speed (miles per hour) 30 50 40 55 30 25 60 25 50 55 Miles per Gallon 28 25 25 23 30 32 21 35 26 25 Answer the following questions and calculate the following descriptive statistics: a) What type of data is it? (cross-sectional, time-series, or panel) b) How many observations in this data? c) Identify types of variables...
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in t...
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following data Speed (Miles per our30 50 40 55 30 24 60 25 51 55 Miles per Gallon 28 24 24 23 30 32 21 35 26 25 Compute the sample correlation coefficient (to 2 decimals and enter negative value as negative number) What can you conclude, based on your computation of the sample correlation coefficient? - Select your answer- Select the...
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted...
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following data: Speed (Miles per Hour) 30 50 40 55 30 24 60 24 51 56 Miles per Gallon 28 24 24 22 30 33 21 Compute the sample correlation coefficient (to 2 decimals and enter negative value as negative number). 35 26 24 What can you conclude, based on your computation of the sample correlation coefficient? - Select your answer -...
Question 2 (10 points) A department of transportation's study on driving speed (mph) and miles per...
Question 2 (10 points) A department of transportation's study on driving speed (mph) and miles per gallon (mpg) for midsize cars resulted in the following data: The mean mph is 42, with a sd of 13.5810, and the mean mpg is 27, with a sd of 4.2687. The covariance is -52.7778. Compute and interpret the sample correlation coefficient.
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted...
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following data: Speed (Miles per Hour) Miles per Gallon Compute the sample correlation coefficient (to 2 decimals and enter negative value as negative number) 29513955 2924 60 25 50 55 28 24 2523 303221 36 25 25 What can you conclude, based on your computation of the sample correlation coefficient? Select your answer Select the correct interpretation for the sample correlation coefficient....
The fuel economy (in miles per gallon) of a certain car is E(x) = −0.01x2 +...
The fuel economy (in miles per gallon) of a certain car is E(x) = −0.01x2 + 0.54x +10.4, where x is the driving speed (in miles per hour, 20 ≤ x ≤ 60). At what speed is fuel economy greatest? x = mph
please provide the correct answer 1. As the speed (in miles per hour) of an automobile...
please provide the correct answer
1. As the speed (in miles per hour) of an automobile increases, the gas mileage (in miles per gallon) first increases and then decreases. Suppose that this relationship is very regular, shown by the following data table and scatterplot. as Speed 30 40 50 60 70 Mileage 20 24 26 24 20 mileage 26 25 24 23 22 21 201 30 40 50 60 70 speed Why would we not want to compute a correlation...
ASAP The speed of your automobile has a huge effect on fuel consumption. Traveling at 65...
ASAP
The speed of your automobile has a huge effect on fuel consumption. Traveling at 65 miles per hour (mph) instead of 55 mph can consume almost 20% more fuel. As a general rule, for every mile per hour over 55, you lose 2% in fuel economy. For example, if your automobile gets 30 miles per gallon at 55 mph, the fuel consumption is 21 miles per gallon at 70 mph. If you take a 400-mile trip and your average...
1. Consider the following sample spot speed data. The speeds are in miles per hour Speed...
1. Consider the following sample spot speed data. The speeds are in miles per hour Speed Grou Lower Limit Upper Limit Mid-point Frequenc 27.5 32.5 37.5 42.5 47.5 52.5 57.5 62.5 67.5 72.5 77.5 82.5 87.5 92.5 25 30 35 40 45 50 22.6 27.6 32.6 37.6 42.6 47.6 52.6 57.6 62.6 67.6 72.6 77.6 82.6 87.6 2 14 25 60 65 70 75 80 85 90 4 (a) Calculate the sample mean speed (b) Calculate the sample median speed...
those pictures are for the one question, please answer all of
them. Thanks!
A study on driving speed (miles per hour) and fuel efficiency (miles per gallon) for midsize automobiles resulted in the following data Click on the datafile logo to reference the data DATA file Driving Speed Fuel Efficiency 30 50 40 55 30 25 60 25 50 55 28 25 25 23 30 32 21 35 26 25 a. Which of the following is a scatter diagram with...
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following data Speed (Miles per our30 50 40 55 30 24 60 25 51 55 Miles per Gallon 28 24 24 23 30 32 21 35 26 25 Compute the sample correlation coefficient (to 2 decimals and enter negative value as negative number) What can you conclude, based on your computation of the sample correlation coefficient? - Select your answer- Select the...
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following data: Speed (Miles per Hour) 30 50 40 55 30 24 60 24 51 56 Miles per Gallon 28 24 24 22 30 33 21 Compute the sample correlation coefficient (to 2 decimals and enter negative value as negative number). 35 26 24 What can you conclude, based on your computation of the sample correlation coefficient? - Select your answer -...
Question 2 (10 points) A department of transportation's study on driving speed (mph) and miles per gallon (mpg) for midsize cars resulted in the following data: The mean mph is 42, with a sd of 13.5810, and the mean mpg is 27, with a sd of 4.2687. The covariance is -52.7778. Compute and interpret the sample correlation coefficient.
A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following data: Speed (Miles per Hour) Miles per Gallon Compute the sample correlation coefficient (to 2 decimals and enter negative value as negative number) 29513955 2924 60 25 50 55 28 24 2523 303221 36 25 25 What can you conclude, based on your computation of the sample correlation coefficient? Select your answer Select the correct interpretation for the sample correlation coefficient....
please provide the correct answer
1. As the speed (in miles per hour) of an automobile increases, the gas mileage (in miles per gallon) first increases and then decreases. Suppose that this relationship is very regular, shown by the following data table and scatterplot. as Speed 30 40 50 60 70 Mileage 20 24 26 24 20 mileage 26 25 24 23 22 21 201 30 40 50 60 70 speed Why would we not want to compute a correlation...
ASAP
The speed of your automobile has a huge effect on fuel consumption. Traveling at 65 miles per hour (mph) instead of 55 mph can consume almost 20% more fuel. As a general rule, for every mile per hour over 55, you lose 2% in fuel economy. For example, if your automobile gets 30 miles per gallon at 55 mph, the fuel consumption is 21 miles per gallon at 70 mph. If you take a 400-mile trip and your average...
1. Consider the following sample spot speed data. The speeds are in miles per hour Speed Grou Lower Limit Upper Limit Mid-point Frequenc 27.5 32.5 37.5 42.5 47.5 52.5 57.5 62.5 67.5 72.5 77.5 82.5 87.5 92.5 25 30 35 40 45 50 22.6 27.6 32.6 37.6 42.6 47.6 52.6 57.6 62.6 67.6 72.6 77.6 82.6 87.6 2 14 25 60 65 70 75 80 85 90 4 (a) Calculate the sample mean speed (b) Calculate the sample median speed...
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