A random sample of 9 history students produced the following data,
first test score, x | second test score, y |
90 | 51 |
36 | 82 |
13 | 15 |
71 | 77 |
82 | 10 |
20 | 18 |
92 | 35 |
53 | 49 |
63 | 85 |
where x measures the first test score and y measures the second test score. What is the estimate of the y = a x + b regression slope coefficient?
Here,
X | Y |
90 | 51 |
36 | 82 |
13 | 15 |
71 | 77 |
82 | 10 |
20 | 18 |
92 | 35 |
53 | 49 |
63 | 85 |
From the data, we have,
The regression slope is given by:
A random sample of 9 history students produced the following data, first test score, x second...
The grades of a class of 9 students on a midterm report (x) and on the final examination (y) are shown below. Use the data to complete parts (a) and (b). (a) Estimate the linear regression line. x 77 55 73 71 81 92 97 99 66 y 82 73 77 36 49 82 99 99 67
A statistics professor would like to build a model relating student scores on the first test to the scores on the second test. The test scores from a random sample of 21 students who have previously taken the course are given in the table. Test Scores Student First Test Grade Second Test Grade 1 70 71 2 93 88 3 79 82 4 83 80 5 65 77 6 80 80 7 71 74 8 84 85 9 44 67...
Of two personnel evaluation techniques, the first requires a 2 hour test interview while the second can be completed in less than an hour. The scores for each of the 15 students who took the test are given in the table. Use MINITAB to answer the following questions. Test 1(x) 75 89 60 71 92 105 55 87 73 77 84 91 75 82 76 test 2 (y) 38 56 35 45 59 70 31 52 48 41 51 58...
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...
test score of all students in Mat 142 classes have a normal distribution. the following is a random sample of 9 test scores from that population : 63, 71, 80, 66, 85, 92, 56, 32, 77 a) determine 95% confidence interval for μ the true mean test score of all Mat142 students( use t-interval procedure) B) based on the interval you obtained in part a is it likely that μ is 86 or more? explain your answer. yes or no...
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...
Find the indicated measure. The test scores of 40 students are listed below. Find P85. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 1) 85 2) 87 3) 89 4) 34
Find the indicated measure. The test scores of 40 students are listed below. Find P85. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 1) 85 2) 87 3) 89 4) 34
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...