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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

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

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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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
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 test from the hours of work. The figure shows a scatterplot and the regression Predicted Test = 86.55 – 0.4817 Work line for these data. 100 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. 90 80 70 60 10 20 30 Work Hours ... a. Choose the correct answer below. O A. The correlation is negative because the graph shows an increasing trend. O B. The correlation is negative because the graph shows a decreasing trend. O C. The correlation is positive because the graph shows a decreasing trend. O D. The correlation is positive 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 down by 86.55 point. D. For each additional hour of work, the score tended to go up by 86.55 point. c. Choose the correct answer below. O A. Approximately 87% of the students do not work. O B. The average score was approximately an 87. O C. A student who did not work would expect to get about 87 on average. 어유
Transcribed Image Text: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 test from the hours of work. The figure shows a scatterplot and the regression Predicted Test = 86.55 – 0.4817 Work line for these data. 100 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. 90 80 70 60 10 20 30 Work Hours ... a. Choose the correct answer below. O A. The correlation is negative because the graph shows an increasing trend. O B. The correlation is negative because the graph shows a decreasing trend. O C. The correlation is positive because the graph shows a decreasing trend. O D. The correlation is positive 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 down by 86.55 point. D. For each additional hour of work, the score tended to go up by 86.55 point. c. Choose the correct answer below. O A. Approximately 87% of the students do not work. O B. The average score was approximately an 87. O C. A student who did not work would expect to get about 87 on average. 어유
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