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Predicted Test 86.55 -0.4817 Work Grades on a political science test and the number of hours of paid work in the week before the test were studied. The instructor was trying to predict the grade on a test from the hours of work. The figure shows a scatterplot and the regression line for these data. a. By looking at the plot and the line (without doing any calculations), state whether the correlation is positive or negative and explain your prediction. b. Interpret the slope. c. Interpret the intercept. 100아. 90 -. 80 70 60 E 10 Work Hours 30 a. Choose the correct answer below. O A. The correlation is negative because the graph shows a decreasing trend. O B. The correlation is positive because the graph shows an increasing trend. OC. The correlation is positive because the graph shows a decreasing trend. O D. The correlation is negative because the graph shows an increasing trend. b. Choose the correct answer below. O A. For each additional hour of work, the score tended to go up by 0.4817 point. O B. For each additional hour of work, the score tended to go down by 0.4817 point. OC. For each additional hour of work, the score tended to go up by 86.55 point. O D. For each additional hour of work, the score tended to go down by 86.55 point. c. Choose the correct answer below. O A. Approximately 87% of the students do not work. O B. A student who did not work would expect to get about 87 on average. O c. The average score was approximately an 87.

Predicted Test 86.55 -0.4817 Work Grades on a political science test and the number of hours of paid work in the week before the test were studied. The instructor was trying to predict the grade on a test from the hours of work. The figure shows a scatterplot and the regression line for these data. a. By looking at the plot and the line (without doing any calculations), state whether the correlation is positive or negative and explain your prediction. b. Interpret the slope. c. Interpret the intercept. 100아. 90 -. 80 70 60 E 10 Work Hours 30 a. Choose the correct answer below. O A. The correlation is negative because the graph shows a decreasing trend. O B. The correlation is positive because the graph shows an increasing trend. OC. The correlation is positive because the graph shows a decreasing trend. O D. The correlation is negative because the graph shows an increasing trend. b. Choose the correct answer below. O A. For each additional hour of work, the score tended to go up by 0.4817 point. O B. For each additional hour of work, the score tended to go down by 0.4817 point. OC. For each additional hour of work, the score tended to go up by 86.55 point. O D. For each additional hour of work, the score tended to go down by 86.55 point. c. Choose the correct answer below. O A. Approximately 87% of the students do not work. O B. A student who did not work would expect to get about 87 on average. O c. The average score was approximately an 87.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The figure shows the relationship between the number of miles per gallon on the highway and that in the city for Predicted Highway MPG = 7.792 + 0.9478 City Mpg 45- 40- some cars. 35- a. Report the slope and explain what it 30- means. 25- b. Either interpret the intercept (7.792) or explain why it is not appropriate to interpret the intercept. 20- 15+ 10 15 20 25 30 35 City mpg (Type integers or decimals. Do not round.) A. A car's predicted highway mpg is times its city mpg. B. A car's predicted highway mpg is more than its city mpg. C. If a car were to get mpg in the city, it would get mpg on the highway. D. For each additional city mpg, the highway value goes up by mpg. b. Select the correct choice below and fill in the answer box(es) to complete your choice. (Type integers or decimals. Do not round.) O A. For each additional city mpg, the highway value goes up by mpg. B. A car's predicted highway mpg is times its city mpg. C. A car's predicted highway mpg is more than its city mpg. D. If a car were to get mpg in the city, it would get mpg on the highway. E. It is inappropriate to interpret the intercept because no cars get mpg in the city. Highway mpg
Transcribed Image Text:The figure shows the relationship between the number of miles per gallon on the highway and that in the city for Predicted Highway MPG = 7.792 + 0.9478 City Mpg 45- 40- some cars. 35- a. Report the slope and explain what it 30- means. 25- b. Either interpret the intercept (7.792) or explain why it is not appropriate to interpret the intercept. 20- 15+ 10 15 20 25 30 35 City mpg (Type integers or decimals. Do not round.) A. A car's predicted highway mpg is times its city mpg. B. A car's predicted highway mpg is more than its city mpg. C. If a car were to get mpg in the city, it would get mpg on the highway. D. For each additional city mpg, the highway value goes up by mpg. b. Select the correct choice below and fill in the answer box(es) to complete your choice. (Type integers or decimals. Do not round.) O A. For each additional city mpg, the highway value goes up by mpg. B. A car's predicted highway mpg is times its city mpg. C. A car's predicted highway mpg is more than its city mpg. D. If a car were to get mpg in the city, it would get mpg on the highway. E. It is inappropriate to interpret the intercept because no cars get mpg in the city. Highway mpg
Predicted Test = 86.55 - 0.4817 Work Grades on a political science test and the number of hours of paid work in the week before the test were studied. The instructor was trying to predict the grade on a test from the hours of work. The figure shows a scatterplot and the regression line for these data. a. By looking at the plot and the line (without doing any calculations), state whether the correlation is positive or negative and explain your prediction. b. Interpret the slope. c. Interpret the intercept. 100 90 F. 80 - 70E 60 10 20 30 40 Work Hours a. Choose the correct answer below. A. The correlation is negative because the graph shows a decreasing trend. B. The correlation is positive because the graph shows an increasing trend. C. The correlation is positive because the graph shows a decreasing trend. O D. The correlation is negative because the graph shows an increasing trend. b. Choose the correct answer below. O A. For each additional hour of work, the score tended to go up by 0.4817 point. B. For each additional hour of work, the score tended to go down by 0.4817 point. C. For each additional hour of work, the score tended to go up by 86.55 point. O D. For each additional hour of work, the score tended to go down by 86.55 point. c. Choose the correct answer below. A. Approximately 87% of the students do not work. B. A student who did not work would expect to get about 87 on average. O C. The average score was approximately an 87.
Transcribed Image Text:Predicted Test = 86.55 - 0.4817 Work Grades on a political science test and the number of hours of paid work in the week before the test were studied. The instructor was trying to predict the grade on a test from the hours of work. The figure shows a scatterplot and the regression line for these data. a. By looking at the plot and the line (without doing any calculations), state whether the correlation is positive or negative and explain your prediction. b. Interpret the slope. c. Interpret the intercept. 100 90 F. 80 - 70E 60 10 20 30 40 Work Hours a. Choose the correct answer below. A. The correlation is negative because the graph shows a decreasing trend. B. The correlation is positive because the graph shows an increasing trend. C. The correlation is positive because the graph shows a decreasing trend. O D. The correlation is negative because the graph shows an increasing trend. b. Choose the correct answer below. O A. For each additional hour of work, the score tended to go up by 0.4817 point. B. For each additional hour of work, the score tended to go down by 0.4817 point. C. For each additional hour of work, the score tended to go up by 86.55 point. O D. For each additional hour of work, the score tended to go down by 86.55 point. c. Choose the correct answer below. A. Approximately 87% of the students do not work. B. A student who did not work would expect to get about 87 on average. O C. The average score was approximately an 87.
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