Homework Answers
After removing the top rightmost point from the scatterplot the slope will decrease and the r will increase.
That is
b will decrease and r will increase.
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Question 12 2 pts If the point in the upper right corner of this scatterplot is...
The following is a scatterplot for profits versus sales (in tens of thousands of dollars) for...
The following is a scatterplot for profits versus sales (in tens of thousands of dollars) for a sample of 14 large companies. The correlation between sales and profits is 0.949. If we omitted the observation in the upper right corner of the scatterplot, the slope of the regression line would increase. change very little. both increase and decrease.
U Question 12 5 pts Look at the following scatterplot. 3001 250 200 150 100 1...
U Question 12 5 pts Look at the following scatterplot. 3001 250 200 150 100 1 2 7 WWW Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from the options below. Or=0.95 Or.0.95 or=0.35 or -0.35 Question 13 5 pts Look at the following scatterplot. 800 700 600 500 100 200 Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from...
e that an animal's gestation period is related to the animal's lifespan? The scatterplot shows Gestation...
e that an animal's gestation period is related to the animal's lifespan? The scatterplot shows Gestation Period (in days) vs. Life Expectancy (in years) for 18 species of mammals. The highlighted point at the far right represents humans. Complete parts a through e 1300M 40 Lite Expectancy a) For these data, r0538. This is not a very strong relationship. Do you think the association would be stronger i humans were removed? Explain O A Stronger. Both slope and correlation would...
U Question 10 5 pts Look at the following scatterplot. ZL 10 0 500 1000 1500...
U Question 10 5 pts Look at the following scatterplot. ZL 10 0 500 1000 1500 2000 Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from the options below. 0-1.0<R<.0.5 OR=-0.05 OR -0,05 O 0.5<R < 1.0 D Question 11 5 pts Look at the following scatterplot. 75 701 Westt ka 66 1.B 50 15 1.7 Heightm Can you estimate the correlation coefficient (R) of the data shown in this...
Question 3 1 pts In the scatter plot below, what effect does the indicated point have...
Question 3 1 pts In the scatter plot below, what effect does the indicated point have on the correlation coefficient and the slope of the least squares regression line? • T The point is influential;r decreases and the slope increases. The point is influential;r decreases and the slope decreases. The point is influential;r decreases and the slope is unaffected. The point is not influential; thereforer and the slope are unaffected. The point is influential; thereforer and the slope are unaffected.
Remaining Time: 0134:51 A scatterpot of Y vs X. The scatterplot displays the points: (10,85), (10,86),.(11,86, (1...
Remaining Time: 0134:51 A scatterpot of Y vs X. The scatterplot displays the points: (10,85), (10,86),.(11,86, (11,87. 1,88), (12,82),.(12,83),(12,88), (12.89), (13.88) . (13,90), (13,91). (14.84), (14,91). (15, 85), (15,87), (15,92), (15,93), (15,94), (16,89), (16,93),(16,95), (17.94) (17,96), (17,97) ation coeficient for the scatterplot above is r - 0.71. We realize that the point (18, 78) was accidentaly onitted rom the data set. We add this point to the data and recalculate r How does the value of r change? (i) The...
Question 3. For each of the following data sets use R to i) sketch a scatterplot...
Question 3. For each of the following data sets use R to i) sketch a scatterplot and the line of best fit. ii) calculate the covariance, correlation and r2 values. Interpret each number. Data set 1. x: -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6 y: -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1 Data set 2. x: 1, 2, 3, 4, 5, 6, 7 y: 5.1, 8.0, 15.5, 10.3,...
3. (26 pts.) The damping ratio ( y ) of a polymer material is measured at...
3. (26 pts.) The damping ratio ( y ) of a polymer material is measured at various temperatures (x) as shown in the table below. Temperature (°C), x, Damping ratio (%), y, у 10 20 30 15 0 10 20 30 40 (1) (14 pts.) Determine the regression equation of y on x in the form, y = a +bx. (So, you need to determine a and b.) (2) (2 pts.) Determine the centroidal point. (3) (2 pts.) Show that...
Data Table The scatterplot to the right and the data table below show, for 2008 cars,...
Data Table The scatterplot to the right and the data table below show, for 2008 cars, the carbon footprint (tons of CO2 per year) vs. highway mileage for 20 family sedans. a) The correlation is - 0.740. Describe the association. b) Are the assumptions and conditions met for finding a correlation? c) Using technology, find the correlation of the data when the car with the lowest carbon footprint and highest highway mpg is not included with the others. Explain why...
Please only answer 5,6,7 ASAP i will rate thumbs up? 3. (26 pts.) The damping ratio...
Please only answer 5,6,7 ASAP i will rate thumbs up?
3. (26 pts.) The damping ratio (y) of a polymer material is measured at various temperatures (*) as shown in the table below. Temperature (°C), x Damping ratio (%), y, 10 8 2010 30 15 0 10 20 30 40 (1) (14 pts.) Determine the regression equation of y on x in the form, y = a +bx. (So, you need to determine a and b.) (2) (2 pts.) Determine...
The following is a scatterplot for profits versus sales (in tens of thousands of dollars) for a sample of 14 large companies. The correlation between sales and profits is 0.949. If we omitted the observation in the upper right corner of the scatterplot, the slope of the regression line would increase. change very little. both increase and decrease.
U Question 12 5 pts Look at the following scatterplot. 3001 250 200 150 100 1 2 7 WWW Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from the options below. Or=0.95 Or.0.95 or=0.35 or -0.35 Question 13 5 pts Look at the following scatterplot. 800 700 600 500 100 200 Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from...
e that an animal's gestation period is related to the animal's lifespan? The scatterplot shows Gestation Period (in days) vs. Life Expectancy (in years) for 18 species of mammals. The highlighted point at the far right represents humans. Complete parts a through e 1300M 40 Lite Expectancy a) For these data, r0538. This is not a very strong relationship. Do you think the association would be stronger i humans were removed? Explain O A Stronger. Both slope and correlation would...
U Question 10 5 pts Look at the following scatterplot. ZL 10 0 500 1000 1500 2000 Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from the options below. 0-1.0<R<.0.5 OR=-0.05 OR -0,05 O 0.5<R < 1.0 D Question 11 5 pts Look at the following scatterplot. 75 701 Westt ka 66 1.B 50 15 1.7 Heightm Can you estimate the correlation coefficient (R) of the data shown in this...
Question 3 1 pts In the scatter plot below, what effect does the indicated point have on the correlation coefficient and the slope of the least squares regression line? • T The point is influential;r decreases and the slope increases. The point is influential;r decreases and the slope decreases. The point is influential;r decreases and the slope is unaffected. The point is not influential; thereforer and the slope are unaffected. The point is influential; thereforer and the slope are unaffected.
Remaining Time: 0134:51 A scatterpot of Y vs X. The scatterplot displays the points: (10,85), (10,86),.(11,86, (11,87. 1,88), (12,82),.(12,83),(12,88), (12.89), (13.88) . (13,90), (13,91). (14.84), (14,91). (15, 85), (15,87), (15,92), (15,93), (15,94), (16,89), (16,93),(16,95), (17.94) (17,96), (17,97) ation coeficient for the scatterplot above is r - 0.71. We realize that the point (18, 78) was accidentaly onitted rom the data set. We add this point to the data and recalculate r How does the value of r change? (i) The...
Question 3. For each of the following data sets use R to i) sketch a scatterplot and the line of best fit. ii) calculate the covariance, correlation and r2 values. Interpret each number. Data set 1. x: -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6 y: -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1 Data set 2. x: 1, 2, 3, 4, 5, 6, 7 y: 5.1, 8.0, 15.5, 10.3,...
3. (26 pts.) The damping ratio ( y ) of a polymer material is measured at various temperatures (x) as shown in the table below. Temperature (°C), x, Damping ratio (%), y, у 10 20 30 15 0 10 20 30 40 (1) (14 pts.) Determine the regression equation of y on x in the form, y = a +bx. (So, you need to determine a and b.) (2) (2 pts.) Determine the centroidal point. (3) (2 pts.) Show that...
Data Table The scatterplot to the right and the data table below show, for 2008 cars, the carbon footprint (tons of CO2 per year) vs. highway mileage for 20 family sedans. a) The correlation is - 0.740. Describe the association. b) Are the assumptions and conditions met for finding a correlation? c) Using technology, find the correlation of the data when the car with the lowest carbon footprint and highest highway mpg is not included with the others. Explain why...
Please only answer 5,6,7 ASAP i will rate thumbs up?
3. (26 pts.) The damping ratio (y) of a polymer material is measured at various temperatures (*) as shown in the table below. Temperature (°C), x Damping ratio (%), y, 10 8 2010 30 15 0 10 20 30 40 (1) (14 pts.) Determine the regression equation of y on x in the form, y = a +bx. (So, you need to determine a and b.) (2) (2 pts.) Determine...
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