Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the For healthy adults, the mean of the x distribution is u = 7.4 (Reference: The Merck a commonly used reference in medical schools and nursing programs). A new drug for nas been developed. However, it is thought that this drug may change blood pH. A ample of 31 patients with arthritis took the drug for 3 months, Blood tests showed that rith sample standard deviation s 1.9. Use a 5% level of significance to test the claim

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Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the
bloods). For healthy adults, the mean of the x distribution is u = 7.4 (Reference: The Merck
Manual, a commonly used reference in medical schools and nursing programs). A new drug for
arthritis has been developed. However, it is thought that this drug may change blood pH. A
random sample of 31 patients with arthritis took the drug for 3 months, Blood tests showed that
x = 8.1 with sample standard deviation s = 1.9. Use a 5% level of significance to test the claim
that the drug has changed (either way) the mean pH level of the blood.
Transcribed Image Text:2. Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the bloods). For healthy adults, the mean of the x distribution is u = 7.4 (Reference: The Merck Manual, a commonly used reference in medical schools and nursing programs). A new drug for arthritis has been developed. However, it is thought that this drug may change blood pH. A random sample of 31 patients with arthritis took the drug for 3 months, Blood tests showed that x = 8.1 with sample standard deviation s = 1.9. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH level of the blood.
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