b)
c)
d)
Residual = Actual - Predicted =
2.7676 |
positive residual means they are above the regression line
e)
Coefficient of determination = R square = 0.894*0.894 = 0.7989
7. The following table list s manager ratings of job performance and attitude for several employees:...
Managers rate employees according to Job Performance and Attitude. The results for several randomly selected employees are given below: Performance X | 60 | 63 65 Attitude Y 72 67 78 71 | 57 | 79 | 80 | 69 | 70 | 63 82 75 87 92 82 88 78 Test the claim that the population correlation coefficient p > 0. Use a=.01. Be sure to include the statements of the null and alternative hypotheses, the Test used, the...
10) Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. Performance 59 | 63 | 65 | 69 | 58 | 77 | 76 | 69 7064 Attitude 72 67 78 82 75 8792 83 87 78
13) Find the value of the linear correlation coefficient r. Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. Performance 59 | 63 | 65 | 69 58 | 77 | 76 69 | 70 64 Attitude 72 67 78 82 75 87 92 83 | 87 78 A. The linear correlation coefficient r is: (rounded to 3 decimal places) B. Using the above data to find the equation of...
Managers in a certain large company rate employees based on attitude and productivity. A random sample of employees had the following ratings. 75 Attitude (x) Productivity (y) 77 62 67 69 81 96 75 67 87 98 92 100 83 89 87 91 80 a) Find the least squares regression line b) Interpret the slope in context c) Describe the relationship between attitude and productivity (be sure to mention the 3 aspects) d) Find the value of the coefficient of...
Problem #1: Consider the below matrix A, which you can copy and paste directly into Matlab. The matrix contains 3 columns. The first column consists of Test #1 marks, the second column is Test # 2 marks, and the third column is final exam marks for a large linear algebra course. Each row represents a particular student.A = [36 45 75 81 59 73 77 73 73 65 72 78 65 55 83 73 57 78 84 31 60 83...
Use the accompanying data set on the pulse rates (in beats per minute) of males to complete parts (a) and (b) below. LOADING... Click the icon to view the pulse rates of males. a. Find the mean and standard deviation, and verify that the pulse rates have a distribution that is roughly normal. The mean of the pulse rates is 71.871.8 beats per minute. (Round to one decimal place as needed.) The standard deviation of the pulse rates is 12.212.2...
Student stress at final exam time comes partly from the
uncertainty of grades and the consequences of those grades. Can
knowledge of a midterm grade be used to predict a final exam grade?
A random sample of 200 BCOM students from recent years was taken
and their percentage grades on assignments, midterm exam, and final
exam were recorded. Let’s examine the ability of midterm and
assignment grades to predict final exam grades.
The data are shown here:
Assignment
Midterm
FinalExam...
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding each answer to the nearest whole number. Using the frequency distribution below (scores on a statistics exam taken by 80 students), determine:ion 1 of the preliminary test (scores on a statistics exam taken by 80 students), determine: 68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75 61 65 75 87 74 62 95...
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding each answer to the nearest whole number. Using the frequency distribution below (scores on a statistics exam taken by 80 students), determine:ion 1 of the preliminary test (scores on a statistics exam taken by 80 students), determine: 68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75 61 65 75 87 74 62 95...
The given data is the grades for people in this class. The goal here is to determine the factors that effect student's Grade in the class. 4) Find the mean and median for the men's and the women's Quizzes. Gender Men Women 5) Test the claim that the majority of students at this class are women. F M F F M F F F F M M F F F M F F F F M M F F M...