Homework Answers
Solution:
| X | Y | XY | X^2 | Y^2 |
| 17 | 110 | 1870 | 289 | 12100 |
| 24 | 120 | 2880 | 576 | 14400 |
| 40 | 141 | 5640 | 1600 | 19881 |
| 45 | 131 | 5895 | 2025 | 17161 |
| 64 | 182 | 11648 | 4096 | 33124 |
| 72 | 199 | 14328 | 5184 | 39601 |
| 29 | 133 | 3857 | 841 | 17689 |
| 57 | 173 | 9861 | 3249 | 29929 |
| 22 | 117 | 2574 | 484 | 13689 |
| n | 9 |
| sum(XY) | 58553.00 |
| sum(X) | 370.00 |
| sum(Y) | 1306.00 |
| sum(X^2) | 18344.00 |
| sum(Y^2) | 197574.00 |
| Numerator | 43757.00 |
| Denominator | 45222.29 |
| r | 0.9676 |
| r square | 0.9362 |
| Xbar(mean) | 41.1111 |
| Ybar(mean) | 145.1111 |
| SD(X) | 19.7034 |
| SD(Y) | 32.4521 |
| b | 1.5519 |
| a | 81.3113 |
The new correlation coefficient is 0.936
The new correlation coefficient r gets stronger going from 0.906 to 0.936.
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The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury)...
The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury)...
The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient of 0.915. Remove the data entry for the man who is 51 years old and has a systolic blood pressure of 201 millimeters of mercury from the data set and find the new correlation coefficient. Describe how this affects the correlation coefficient r. Use technology. Click the icon to view the data...
Question Help * The ages (n years) of 10 men and their systolic blood pressures (in...
Question Help * The ages (n years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient r of 0.911. Remove the data entry for the man who is 49 years old and has a systolic blood pressure of 198 millimeters of mercury from the data set and find the nevw correlation coefficient. Describe how this affects the correlation coefficient r. Use technology 囲Click the icon...
Systolic blood Age, x pressure, y 16 108 121 27 143 37 130 198 51 183 63 198 71 129 28 176 57 119 23 Done Print The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mer...
Systolic blood Age, x pressure, y 16 108 121 27 143 37 130 198 51 183 63 198 71 129 28 176 57 119 23 Done Print The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient r of 0.921. Remove the data entry for the man who is 51 years old and has a systolic blood pressure of 198 millimeters of...
Systolic blood Age, x pressure, y 16 108 121 27 143 37 130 198 51 183...
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Recorded in the table below are the blood pressure measurements (in millimeters) for a sample of...
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A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure...
A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d = (blood pressure before taking new drug)-(blood pressure after taking new drug). Use a significance level of a = 0.05 for the test. Assume that the systolic blood...
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A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 22 hours after taking the drug are shown in the table below. Using this data, find the 99%99% confidence interval for the true difference in blood pressure for each patient after taking the new drug. Assume that the blood pressures are normally distributed for the population of patients both before and...
A pharmaceutical company.claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in...
A pharmaceutical company.claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d (blood pressure before taking new drug)-(blood pressure after taking new drug). Use a significance level of a 0.05 for the test. Assume that the systolic blood pressure levels are...
Listed below are systolic blood pressure measurements (in mm Hg) obtained from the same woman. Find the regression eq...
Listed below are systolic
blood pressure measurements (in mm Hg) obtained from the same
woman. Find the regression equation, letting the right arm blood
pressure be the predictor (x) variable. Find the best predicted
systolic blood pressure in the left arm given that the systolic
blood pressure in the right arm is 85 mm Hg. Use a significance
level of 0.05.
mm Hg) obtained from the same woman. Find the regression equation, letting the right arm blood pressure be the...
The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient of 0.915. Remove the data entry for the man who is 51 years old and has a systolic blood pressure of 201 millimeters of mercury from the data set and find the new correlation coefficient. Describe how this affects the correlation coefficient r. Use technology. Click the icon to view the data...
Question Help * The ages (n years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient r of 0.911. Remove the data entry for the man who is 49 years old and has a systolic blood pressure of 198 millimeters of mercury from the data set and find the nevw correlation coefficient. Describe how this affects the correlation coefficient r. Use technology 囲Click the icon...
Systolic blood Age, x pressure, y 16 108 121 27 143 37 130 198 51 183 63 198 71 129 28 176 57 119 23 Done Print The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient r of 0.921. Remove the data entry for the man who is 51 years old and has a systolic blood pressure of 198 millimeters of...
Systolic blood Age, x pressure, y 16 108 121 27 143 37 130 198 51 183 63 198 71 129 28 176 57 119 23 Done Print The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient r of 0.921. Remove the data entry for the man who is 51 years old and has a systolic blood pressure of 198 millimeters of...
Recorded in the table below are the blood pressure measurements (in millimeters) for a sample of 12 adults. Does there appear to be a linear relationship between the diastolic ar systolic blood pressures? At the 5% significance level, test the claim that systolic blood pressure and diastolic blood pressure have a linear relationship. Systolic Diastolic 108 69 130 76 110 74 112 75 113 77 115 83 105 66 116 70 133 91 154 94 119 69 118 88 Data...
A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d = (blood pressure before taking new drug)-(blood pressure after taking new drug). Use a significance level of a = 0.05 for the test. Assume that the systolic blood...
A pharmaceutical company.claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d (blood pressure before taking new drug)-(blood pressure after taking new drug). Use a significance level of a 0.05 for the test. Assume that the systolic blood pressure levels are...
Listed below are systolic
blood pressure measurements (in mm Hg) obtained from the same
woman. Find the regression equation, letting the right arm blood
pressure be the predictor (x) variable. Find the best predicted
systolic blood pressure in the left arm given that the systolic
blood pressure in the right arm is 85 mm Hg. Use a significance
level of 0.05.
mm Hg) obtained from the same woman. Find the regression equation, letting the right arm blood pressure be the...
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