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A new drug is introduced that is supposed to reduce fevers. Tests are done with the...

A new drug is introduced that is supposed to reduce fevers. Tests are done with the drug. The drug is given to 70 people who have fevers. It is found that the mean time that it takes for the fever to get back to normal for this test group is 400 minutes with a standard deviation of 85 minutes. Find the 95% confidence interval for the mean time that the drug will take to reduce all fevers for all people.

math   Statistics-And-Probability   
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Soluson Griven that, X 400 S-85 when sample standard deviahon is qiven then use t-distributson. df-m-1-70-1-79 At 95% Confidence level the t İs 쓸-0.을s : 0.025 = ↓-990 - using t-table: At g57. CD nfidene interval 1s2 40ot 20.2 2 (379-78 420.22) The 957 confidenee interval is, C379.78,420.22

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