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Regression Quiz 2 (25 MCQs)

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1. How many coefficients do you need to estimate in a simple linear regression model (One independent variable)?
2. The slope of the LSRL for the points (1, 2), (3, 4) and (5, 6). What is the yintercept?
3. What is the slope in the following equation:y= 6-2/3x?
4. What would the correlation be between math grades and the time it takes to run a mile?
5. The regression line of Y on X is 5x-7y=10, then the regression coefficient of Y on X is
6. A correlation shows that two things are
7. The number of siblings you have and the temperature outside
8. An influential observation is most often
9. $ y=?+b_1x_1$ The? should be the _____
10. When r=0 the regression lines are
11. The sign of the correlation coefficient tells you whether you have
12. An influential point in the context of least square regression lines is a
13. What is the best definition of the least squares regression line?
14. What key do you type on the calculator to enter data into a table.
15. What type of correlation do you think there is between:Outside Temperature & Heating Bill
16. Which is the best CONTEXTUAL description of the y-intercept for the linear regression equation of the rats:Weight = 100 + 40(Time)?
17. The range of regression coefficient is _____
18. If $ bxy$ is greater than 1 then $ byx$ is _____
19. Which of the following are true about the least-square regression line? I. The average of its residuals is 0. II. The sum of its residuals is zero. III. It is the line that produces the highest r-value.
20. If the slope of the regression equation y = bo + b1x is positive, then;
21. In regression analysis, the variable that is being predicted is;
22. If Linear regression model perfectly first i.e., train error is zero, then
23. Which of the following correlation coefficients shows the strongest relationship? (Hint:A correlation that is negative can still be strong.)
24. What is the y-intercept in the following equation:y=-5-4x?
25. What would the correlation between elevation and temperature be?
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