Questions A and B. Please! Let x be a random variable that represents the pH of arterial plasma (i.e., acidity 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 36patients 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 levelsignificance?7.4State the null and alternate hypotheses.H,i u > 7.4; H, : u = 7,4Hi u = 7.4; H,: 4 < 7.4O DH,: u = 7.4; H,: 4 +7.4O H,: u = 7.4; H, : > 7.4Hoi u + 7.4; H,i 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 o is unknown.O The Student's t, since the sample size is large and o is known.O The standard normal, since the sample size is large and o 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.)

Name: Questions A and B. Please! Let x be a random variable that represents
Uploaded: 2024-03-20T07:07:37.000Z
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Description: Questions A and B. Please! Let x be a random variable that represents the pH of arterial plasma (i.e., acidity 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

Sample size (n) = 36 Sample mean (x̅) = 8.6 Sample standard deviation (s) = 3.3a) The level of significance (α) = 0.05 The hypotheses are as follow: H0: µ = 7.4 H1: µ ≠ 7.4b) Since, the sample size is large and population standard deviation (σ) is unknown, therefore, the student’s t distribution will be used. The value of the test statistic can be obtained as: