B Predict The Study Time For A 45 Year Old C On What Criterion Is The Regression Equation Based On D Define The Coef 1 (29.1 KiB) Viewed 26 times
b) Predict the study time for a 45-year-old c) On what criterion is the regression equation based on? d) Define the coefficient of determination (?). • What is the range for r' values? • Describe the usefulness of regression equation for making predictions using the coefficient of determination e) Obtain the coefficient of determination (r) for the data above. Interpret the results of r in terms of making predictions. f) Define the linear correlation coefficient (r). • What is the range for values? • Describe the strength of linear relationship between the two variables to make predictions using the linear correlation coefficient. 8) Compute the linear correlation coefficient (r) for the data above. Interpret the results of r in terms of relationship between the two variables and usefulness of making predictions.
Linear regression equation (chapter 14): y=GX+ X= independent variable (predictor), v=dependent variable (response) Regression equation/line is based on the least square criterion (smallest possible sum of squared errors). (coefficient of determination)- usefulness of regression equation in making predictions, range and interpretation. (linear correlation coefficient)-strength of the relationship between the two variables, range and interpretation. AGE ៧/៨ ជាន់ NA Question #3: For the data below: AGE Time studying per Week in its 21 5.3 22 8 36 6.6 54 4.2 19 6.7 25 3.4 22 7.7 31 5.5 35 9.4 42 7.2 33 4.9 25 7.8 27 6 33 5.1 26 8.4 23 21 29 32 29 24 23 30 59 24 37 27 20 21 26 DN 00 Time studying per week in hrs 4.8 7.3 6.6 7.1 4.4 4.9 9.1 6.7 8.9 5.3 5.8 6.2 5.3 2.9 6.8 00 po a) Determine the regression equation.
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