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There is some variability in the amount of phenobarbital

Introduction to Probability and Statistics for Engineers and Scientists | 5th Edition | ISBN: 9780123948113 | Authors: Sheldon M. Ross ISBN: 9780123948113 226

Solution for problem 13 Chapter 8

Introduction to Probability and Statistics for Engineers and Scientists | 5th Edition

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Introduction to Probability and Statistics for Engineers and Scientists | 5th Edition | ISBN: 9780123948113 | Authors: Sheldon M. Ross

Introduction to Probability and Statistics for Engineers and Scientists | 5th Edition

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Problem 13

There is some variability in the amount of phenobarbital in each capsule sold by a manufacturer. However, the manufacturer claims that the mean value is 20.0 mg. To test this, a sample of 25 pills yielded a sample mean of 19.7 with a sample standard deviation of 1.3. What inference would you draw from these data? In particular, are the data strong enough evidence to discredit the claim of the manufacturer? Use the 5 percent level of significance.

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Textbook: Introduction to Probability and Statistics for Engineers and Scientists
Edition: 5
Author: Sheldon M. Ross
ISBN: 9780123948113

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There is some variability in the amount of phenobarbital