A factory makes cables. A study of a sample of 50 cables gave an average of the
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A factory makes cables. A study of a sample of 50 cables gave an average of the maximum supported loads equal to 12.2 tonnes. We assume that the weight in tonnes carried by a cable from this factory is a var X ∼ N (µ, (0, 5) ^2), with µ unknown.
Q1: Determine a confidence interval for µ at the 95% level
Q2: If you increase the sample size, will the width of the confidence intervals increase? If yes, explain your reasoning.
Related Book For
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073212227
8th Edition
Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell
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