For a simple linear regression model, if the coefficient of correlation is 0.75, what does the coefficient of determination equal?

in a regression analysis 68% of students test score is determined by class absenteeism. The relationship between class absenteeism and test score has a linear equation of Y= 34-0.85(X) what the correlation coefficient is a. 0.4624 b. -0.85 c. -0.8246 d none of the above e.0.68

A study of king penguins looked for a relationship between how deep the penguins dive to seek food and how long they stay underwater. For all but the shallowest dives, there is a linear relationship that is different for different penguins. The study report gives a scatterplot for one penguin titled, “The relation of dive duration (DD) to depth (D).” Duration DD is measured in minutes, and depth D is in meters. The report then says, “The regression equation for this bird is, DD=2.69+0.0138D.is, DD=2.69+0.0138D.”  According to the regression line, how long does a typical dive to a depth of 200200 meters last?  The dives varied from 40 meters40 meters to 300 meters300 meters in depth. Use the regression equation to determine DD for D=40D=40 and D=300D=300 and then plot the regression line from D=40D=40 to D=300.to D=300. Give your answers to two decimal places.

A study of king penguins looked for a relationship between how deep the penguins dive to seek food and how long they stay underwater. For all but the shallowest dives, there is a linear relationship that is different for different penguins. The study report gives a scatterplot for one penguin titled, “The relation of dive duration (DD) to depth (D).” Duration DD is measured in minutes, and depth D is in meters. The report then says, “The regression equation for this bird is, DD=2.69+0.0138D.is, DD=2.69+0.0138D.” What is the slope of the regression line? Give your answer to four decimal places.What does this slope says about this penguin's dives ?

The strength (degree) of the correlation between a set of independent variable X anda dependent variable Y is measured byA. Regression EquationB. Coefficient of DeterminationC. Simple RegressionD. None of the above

The​ least-squares regression equation is y=620.6x+16,624 where y is the median income and x is the percentage of 25 years and older with at least a​ bachelor's degree in the region. The scatter diagram indicates a linear relation between the two variables with a correlation coefficient of 0.7004. Interpret the slope.

To determine the effectiveness of group study sessions, a college instructor gathers data on hours of attendance and exam scores for students in the class. Which variable, hours of attendance or exam scores, would be the response variable for a least-squares regression equation? is it hours of attendance or exam scores?

A temperature dataset gives y mean April temperature (Fahrenheit) and x = geographic latitude for 20 U.S. cities. The simple linear regression equation for the sample is ŷ = 119 - 1.64x. (a) The value of latitude for a certain city is 41. What is the predicted April temperature for this city? (Round your answer to the nearest tenth.) degrees Fahrenheit (b) The mean April temperature for this city is 48. What is the residual for the city? (Round your answer to the nearest tenth.) degrees Fahrenheit You may need to use the appropriate table in the Appendix of Tables to answer this question.

Define the different ways to use linear regression?

When the correlation coefficient (r) is zero, we can say: Choose one: a. the variables are not related B. the regression line fit is perfect C. the regression line is horizontal D. the variables are not linearly related