SOLUTION: A sample of 20 elements produced a mean of 81.4 and a standard deviation of 10.44.
Assuming the population has a normal distribution, construct a 90% confidence interval for
the
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-> SOLUTION: A sample of 20 elements produced a mean of 81.4 and a standard deviation of 10.44.
Assuming the population has a normal distribution, construct a 90% confidence interval for
the
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Question 1159423: A sample of 20 elements produced a mean of 81.4 and a standard deviation of 10.44.
Assuming the population has a normal distribution, construct a 90% confidence interval for
the population mean. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Half-interval or margin of error is a t (0.95, df=19 )=1.73 *s/sqrt(n)
=1.73*10.44/sqrt(20)
=4.04
the 90% CI for the mean is ((77.36, 85.44)
