Question

Find the value of the linear correlation coefficient A study was conducted to compare the average time spent in the lab each week versus course grade 7) for computer programming students. The results are recorded in the table below. 51 16 15 16 10 81 51 C) 0.462 A) 0017 B)-0.284 D) -0.335 8) Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below iertonnance 59 |의 65169 ↓ 5 7 76 1 69 1 70164 ,,愕愕 갉하岢骿 Attitude 72 67 78 8275 8792 838728 A) 0.916 B) 0.610 C) 0863 D) 0.729 Use the given data to find the equation of the regression line. Round the final values to three significant digits, if 9) Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0. The following data were obtained 9) regarding their GPAs on entering the program versus their current GPAs 3.5 3.8 3.6 3.6 3.5 3.9 4.0 3.9 3.5 3.7 3.6 3.9 3.9 3.8 3.7 3.9 3.8 4.0 A) y- 2.51+0.329x C y -3.67+0.0313x B)y-5.81+ 0.497x D) y - 4.91+0.0212x Use the given data to find the best predicted value of the response variable. 10) Based on the data from six students, the regression equation relating number of hours of 10) preparation (x) and test score (y) is y 67.3+1.07x. The same data yield r 0.224 and y-75.2 What is the best predicted test score for a student who spent 4 hours preparing for the test? A) 75.2 B) 59.7 C)71.6 D) 78.1

Answer 1