A pharmaceutical company manufactures tranquilizers. It is assumed that the distribution for the length of time they last is approximately normal. Researchers in a hospital used the drug on a random sample of 9 patients. The average effective period for the sample was 2.5 hours, and the standard deviation for the sample was 0.3 hours. A.) Construct a 95% confidence interval for the population mean length of time that the tranquilizer works. B.) Provide an interpretation of your interval. C.) What does it mean to be 95% confident in this problem?
Added by Heather V.
Step 1
Given that t = 2.306, s = 0.3, and n = 9, we can calculate: \( e = \frac{2.306 \times 0.3}{\sqrt{9}} = 0.2306 \) ** Show more…
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