MATH302 Questions and Answers | Latest Update | 2024/2025 | Graded A+

MATH302 Questions and Answers | Latest Update | 2024/2025 | Graded A+ Describe how the scatter plot looks. Select all relevant characteristics. - A) Non-linear - B) Negative - C) Weak - D) Linear - E) Positive - F) Strong - D) Linear, E) Positive, F) Strong A teacher suspects that the score on the third homework assignment can predict midterm exam performance. If x represents the third homework score and y represents the midterm score, what is the correlation coefficient for the sample data provided, assuming normal distribution? Round your answer to four decimal places. - A) 0.7842 - B) 0.6543 - C) 0.9846 - D) 0.9345 - C) 0.9846 For the regression equation ( y' = -3 + 2.5x ) fitted to the data points (28, 60), (20, 50), (10, 18), and (25, 55), what is the sum of the squared residuals? - A) 104.15 - B) 87.30 - C) 94.25 - D) 101.50 - C) 94.25 Given a data set with 15 points, how many degrees of freedom does it have? - A) 15 - B) 14 - C) 13 - D) 12 - B) 14 If a strong linear relationship between two variables is identified through a test for linear regression, can you directly assert causation between the two variables? - A) Yes, strong correlation implies causation - B) No, further investigation is needed to rule out lurking variables - C) Yes, if the correlation coefficient is high enough - D) No, but it strongly suggests causation - B) No, further investigation is needed to rule out lurking variables A researcher studies body frame size by measuring wrist circumference and height. Given the data, determine the regression equation and predict the value for a given x. - A) y = 31.6304 + 5.4496x - B) y = 30.6245 + 4.8895x - C) y = 32.6789 + 5.1234x - D) y = 33.4567 + 5.7890x - A) y = 31.6304 + 5.4496x Predict the height for an individual with a wrist circumference