This quiz works best with JavaScript enabled. Home > Ugc Net > Paper 1 > Research Stats > Regression – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Regression Quiz 3 (13 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In the equation of a straight line, Y = bX + a the term, b is the A) Dependent variable. B) Independent Variable. C) Slope. D) Intercept. Show Answer Correct Answer: C) Slope. 2. What type of correlation (association)?The outside temperature and the amount of layers you wear. A) Positive correlation. B) Negative correlation. C) No correlation. D) None of above. Show Answer Correct Answer: B) Negative correlation. 3. You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values? A) As x increases, y decreases. B) As x increases, y increases. C) As x decreases, y decreases. D) None of above. Show Answer Correct Answer: A) As x increases, y decreases. 4. A residual is defined as A) The difference between the actual Y values and the mean of Y. B) The difference between the actual Y values and the predicted Y values. C) The predicted value of Y for the average X value. D) The square root of the slope. Show Answer Correct Answer: B) The difference between the actual Y values and the predicted Y values. 5. The equation y =-2x + 7 models the amount of gas remaining in a lawnmower after x hours of use since it was filled. What is the meaning of the slope? A) For each hour of mowing, the mower is predicted to use 2 gallons. B) The predicted amount of gas the lawnmower can hold is 2 gallons. C) For every two hours of mowing, the mower is predicted to use 7 gallons. D) The predicted amount of gas remaining after 1 hour is 2 gallons. Show Answer Correct Answer: A) For each hour of mowing, the mower is predicted to use 2 gallons. 6. Which of the following can affect the value of the correlation r? I. A change in measurement units II. Adding a constant to all values of the y-variable III. Interchanging x and y IV. Adding another data point A) III only. B) IV only. C) III and IV. D) II, III, and IV. Show Answer Correct Answer: B) IV only. 7. Which one of the following is the most appropriate definition of a 99% confidence interval? A) 99% of the time in repeated samples, the null hypothesis will be rejected. B) 99% of the time in repeated samples, the interval would contain the true value of the parameter. C) 99% of the time in repeated samples, the null hypothesis will not be rejected when it was false. D) 99% of the time in repeated samples, the interval would contain the estimated value of the parameter. Show Answer Correct Answer: B) 99% of the time in repeated samples, the interval would contain the true value of the parameter. 8. The term regression was introduced by ..... A) R A Fischer. B) Sir Francis Galton. C) Karl Pearson. D) None of these. Show Answer Correct Answer: B) Sir Francis Galton. 9. What should a residual plot look like? A) Distinct Pattern. B) Curve. C) Random with no pattern. D) A few clumps. Show Answer Correct Answer: C) Random with no pattern. 10. What is the regression equation used for? A) To make the graph looks pretty. B) To connect the point. C) To indicate where all data points should lie. D) To make predictions. Show Answer Correct Answer: D) To make predictions. 11. Simple linear regression is A) Unstandardized. B) Standardized. C) Only an inferential statistic. D) Only used when the predictor is a continuous variable. Show Answer Correct Answer: A) Unstandardized. 12. If there is NO correlation between 2 variables, the correlation coefficient is ..... A) 1. B) -1. C) 0. D) None of above. Show Answer Correct Answer: C) 0. 13. If a regression coefficient is less than 1 then the other should be? A) Greater than 1. B) 0. C) Less than 1. D) Equal to 1. Show Answer Correct Answer: A) Greater than 1. ← PreviousRelated QuizzesPaper 1 QuizzesUgc Net QuizzesRegression Quiz 1Regression Quiz 2Analysis Of Variance QuizChi Square QuizCoefficient Of Variation Discrete Serious And Continuous Serious QuizConcept Of Point And Interval Estimation QuizConcept Of Sampling And Other Concepts Related To Sampling QuizConfidence Intervals Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books