Let x be a random variable that represents the pH of arterial plasma (i.e açidity of the blood). For healthy adults, the mean of the x distribution is u 7.4.1 A new drug for arthritis has been developed. However, it is thought that this drug may change blood pH. A random sample of patients with arthritis took the drug for 3 months. Blood tests showed that x= 8.6 with sample standard deviation s = 3.3. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH level of the blood. A USE SALT (a) what is the level of significance? 7.4 State the null and alternate hypotheses. H,i u> 7.4 H,: u 7.,4 H,i u - 7.4; H, 1 u < 7,4 4,i u 7.4) M, 1 M 7.4 • H,1 u 7.4) H, > 7.4 Hoi u* 7.4; H,1 u = 7.4 (b) what sampling distribution will you use? Explain the rationale for your choice of sampling distribution. • The Student's t, since the sample size is large and e is unknown. O The Student's t, since the sample size is large and e is known. O The standard normal, since the sample size is large and a is known. O The standard normal, since the sample size is large and o is unknown. What is the value of the sample test statistic? (Round your answer to three decimal places.)
Let x be a random variable that represents the pH of arterial plasma (i.e açidity of the blood). For healthy adults, the mean of the x distribution is u 7.4.1 A new drug for arthritis has been developed. However, it is thought that this drug may change blood pH. A random sample of patients with arthritis took the drug for 3 months. Blood tests showed that x= 8.6 with sample standard deviation s = 3.3. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH level of the blood. A USE SALT (a) what is the level of significance? 7.4 State the null and alternate hypotheses. H,i u> 7.4 H,: u 7.,4 H,i u - 7.4; H, 1 u < 7,4 4,i u 7.4) M, 1 M 7.4 • H,1 u 7.4) H, > 7.4 Hoi u* 7.4; H,1 u = 7.4 (b) what sampling distribution will you use? Explain the rationale for your choice of sampling distribution. • The Student's t, since the sample size is large and e is unknown. O The Student's t, since the sample size is large and e is known. O The standard normal, since the sample size is large and a is known. O The standard normal, since the sample size is large and o is unknown. What is the value of the sample test statistic? (Round your answer to three decimal places.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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