Basic Computation: Confidence Interval A random sample of size 81 has sample mean 20 and sample standard
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Basic Computation: Confidence Interval A random sample of size 81 has sample mean 20 and sample standard deviation 3.
(a) Check Requirements Is it appropriate to use a Student’s t distribution to compute a confidence interval for the population mean m? Explain.
(b) Find a 95% confidence interval for m.
(c) Interpretation Explain the meaning of the confidence interval you computed.
In Problems 15–21, assume that the population of x values has an approximately normal distribution.
AppendixLO1
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Understandable Statistics Concepts And Methods
ISBN: 9780357719176
13th Edition
Authors: Charles Henry Brase, Corrinne Pellillo Brase
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