A magazine tested paints. The table below shows the overall quality score and cost in dollars...
A magazine tested paints. The table below shows the overall quality score and cost in dollars per gallon. Use the rank correlation coefficient to test for a correlation between the two variables. Use a significance level of α=0.01. Based on these results, do you get better quality paint by paying more?
Determine the null and alternative hypotheses for this test.
Determine the correlation coefficient.
|
Quality |
82 |
85 |
63 |
76 |
85 |
80 |
62 |
79 |
74 |
72 |
68 |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Cost |
21 |
20 |
26 |
16 |
20 |
29 |
25 |
21 |
22 |
23 |
16 |
Homework Answers
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A magazine tested paints. The table below shows the overall
quality score and cost in dollars...
1. 2. 3. A magazine tested paints. The table below shows the overall quality score and...
1.
2.
3.
A magazine tested paints. The table below shows the overall quality score and cost in dollars per gallon. Use the rank correlation coefficient to test for a correlation between the two variables. Use a significance level of a = 0.01. Based on these results, do you get better quality paint by paying more? 73 Quality Cost 78 19 84 18 66 27 74 15 84 18 77 30 63 24 75 19 20 69 21 68 O...
1. 2. 3. A magazine tested paints. The table below shows the overall quality score and...
1.
2.
3.
A magazine tested paints. The table below shows the overall quality score and cost in dollars per gallon. Use the rank correlation coefficient to test for a correlation between the two variables. Use a significance level of a=0.01. Based on these results, do you get better quality paint by paying more? 74 Quality Cost 78 19 84 18 66 27 84 18 77 30 63 24 75 19 73 20 69 21 68 15 15 What are...
Consider the below matrixA, which you can copy and paste directly into Matlab.
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 Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding...
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...
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 accompanying data set on the pulse rates (in beats per minute) of males to...
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...
Find the indicated measure. The test scores of 40 students are listed below. Find P85.
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...
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
Please compute your z -don't use a package State your conclusion in plain English - not...
Please compute your z -don't use a package State your conclusion in plain English - not just rejection 1 Students in the online class are suspicious that their schools 60 point loss may have caused their teacher to take out his frustration on the students by giving them a harder than usual exam. They manage to hack into his computer and get the following data: Scores for test Nov 2011 71 74 64 77 58 72 73 79 50 78...
Question 1 15 pts Test scores for a class of 40 students are listed below: 25...
Question 1 15 pts Test scores for a class of 40 students are listed below: 25 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 a) The mean of the sample data is b) The median of the sample data is c) The standard deviation of the sample data is...
1.
2.
3.
A magazine tested paints. The table below shows the overall quality score and cost in dollars per gallon. Use the rank correlation coefficient to test for a correlation between the two variables. Use a significance level of a = 0.01. Based on these results, do you get better quality paint by paying more? 73 Quality Cost 78 19 84 18 66 27 74 15 84 18 77 30 63 24 75 19 20 69 21 68 O...
1.
2.
3.
A magazine tested paints. The table below shows the overall quality score and cost in dollars per gallon. Use the rank correlation coefficient to test for a correlation between the two variables. Use a significance level of a=0.01. Based on these results, do you get better quality paint by paying more? 74 Quality Cost 78 19 84 18 66 27 84 18 77 30 63 24 75 19 73 20 69 21 68 15 15 What are...
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
Please compute your z -don't use a package State your conclusion in plain English - not just rejection 1 Students in the online class are suspicious that their schools 60 point loss may have caused their teacher to take out his frustration on the students by giving them a harder than usual exam. They manage to hack into his computer and get the following data: Scores for test Nov 2011 71 74 64 77 58 72 73 79 50 78...
Question 1 15 pts Test scores for a class of 40 students are listed below: 25 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 a) The mean of the sample data is b) The median of the sample data is c) The standard deviation of the sample data is...
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