MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Aviation and high-altitude physiology is a specialty in the study of medicine. Let x = partial pressure of oxygen in the alveoli (air cells in the lungs) when breathing naturally available air. Let y = partial pressure when breathing pure oxygen. The (x, y) data pairs correspond to elevations from 10,000 feet to 30,000 feet in 5000 foot intervals for a random sample of volunteers. Although the medical data were collected using airplanes, they apply equally well to Mt. Everest climbers (summit 29,028 feet) 7.3 3.2 y 43.8 33.9 3.3 (units: mm Hg/10) 26.2 16.2 (units: mm Hg/10) (a) Verify that Ex = 22.1, Zy = 134, Ex2 = 113.27, Ey2 = 4209.74, Exy = 688.71, and r = 0.982. Ex Ey Ex2 Ev2 Exy (b) Use a 1% level of significance to test the claim that p > 0. (Use 2 decimal places.) critical t Conclusion O Reject the null hypothesis, there is sufficient evidence that p > 0. O Reject the null hypothesis, there is insufficient evidence that p > 0. O Fail to reject the null hypothesis, there is insufficient evidence that p > 0. O Fail to reject the null hypothesis, there is sufficient evidence that p > 0. (c) Verify that S. = 2.7085, a = -0.543, and b = 6.186. Sel (d) Find the predicted pressure when breathing pure oxygen if the pressure from breathing available air is x = 2.7. (Use 2 decimal places.) (e) Find a 90% confidence interval for y when x = 2.7. (Use 1 decimal place.) lower limit upper limit (f) Use a 1% level of significance to test the claim that / > 0. (Use 2 decimal places.) Critical t Conclusion O Reject the null hypothesis, there is sufficient evidence that B > 0. O Reject the null hypothesis, there is insufficient evidence that f > 0. O Fail to reject the null hypothesis, there is insufficient evidence that ( > 0. O Fail to reject the null hypothesis, there is sufficient evidence that f > 0. g) Find a 90% confidence interval for $ and interpret its meaning. (Use 2 decimal places.) lower limit upper limit Interpretation For a one-unit increase in oxygen pressure breathing only available air, the oxygen pressure breathing pure oxygen decreases by an amount that falls outside the confidence interval. For a one-unit increase in oxygen pressure breathing only available air, the oxygen pressure breathing pure oxygen increases by an amount that falls outside the confidence interval. For a one-unit increase in oxygen pressure breathing only available air, the oxygen pressure breathing pure oxygen ncreases by an amount that falls within the confidence interval