2. (20 points) It is very important that treatments are developed to save the lives of those who are critically ill from COVID-19. Critically ill patients often require mechanical ventilators, which use positive pressure to assist or push a breath into the lungs. Pressure Support is a common type of breathing support used when a patient needs partial support. The amount of Pressure Support delivered is measured in cm H₂O and ranges between 5 (minimal support) and 30 (total support). Source: London Health Sciences Centre. Suppose that a new treatment is being tested and a simple random sample of 12 patients who are on mechanical ventilators and receive the treatment are selected. The following table shows the Pressure Support levels, in cm H₂O, required before the treatment and two days after the treatment for the 12 different patients. Patient Pressure Support Before Treatment Pressure Support After Treatment Difference d A B 28 20 26 20 C 21 16 D 18 21 E 24 21 F 30 30 G 9 6 H 15 12 I 24 22 J 17 11 K 20 20 L 11 7 Use a 0.01 significance level to test the claim that there is a reduction in Pressure Support (and hence an improvement in condition) using this new treatment. Assume that the differences have a normal distribution.

2. (20 points) It is very important that treatments are developed to save the lives of those who are critically ill from COVID-19. Critically ill patients often require mechanical ventilators, which use positive pressure to assist or push a breath into the lungs. Pressure Support is a common type of breathing support used when a patient needs partial support. The amount of Pressure Support delivered is measured in cm H₂O and ranges between 5 (minimal support) and 30 (total support). Source: London Health Sciences Centre. Suppose that a new treatment is being tested and a simple random sample of 12 patients who are on mechanical ventilators and receive the treatment are selected. The following table shows the Pressure Support levels, in cm H₂O, required before the treatment and two days after the treatment for the 12 different patients. Patient Pressure Support Before Treatment Pressure Support After Treatment Difference d A B 28 20 26 20 C 21 16 D 18 21 E 24 21 F 30 30 G 9 6 H 15 12 I 24 22 J 17 11 K 20 20 L 11 7 Use a 0.01 significance level to test the claim that there is a reduction in Pressure Support (and hence an improvement in condition) using this new treatment. Assume that the differences have a normal distribution.

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter7: Analytic Trigonometry

Section7.6: The Inverse Trigonometric Functions

Problem 91E

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