SOLUTION: A random sample of 16 pharmacy customers showed the waiting times below (in minutes)Find a 90 percent confidence interval for u. assuming that the sample is from a normal populatio
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Question 308543: A random sample of 16 pharmacy customers showed the waiting times below (in minutes)Find a 90 percent confidence interval for u. assuming that the sample is from a normal population
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Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A random sample of 16 pharmacy customers showed the waiting times below (in minutes)Find a 90 percent confidence interval for u. assuming that the sample is from a normal population
21 22 22 17 21 17 23 20
20 24 9 22 16 21 22 21
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Find the sample mean and the sample std.
x-bar = 19.73
s = 3.7315
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E = 1.645*3.7315/sqrt(16) = 1.5344
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90% CI: 19.73-1.5344 < u < 19.73+1.5344
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cheers,
Stan H.
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