Question
The breaking strengths of cables produced by a certain manufacturer have a standard deviation 85of pounds. A random sample of 90 newly manufactured cables has
The breaking strengths of cables produced by a certain manufacturer have a standard deviation 85of pounds. A random sample of 90 newly manufactured cables has a mean breaking strength of 1700pounds. Based on this sample, find a 95 %confidence intervalfor the true mean breakingstrength of all cables produced by this manufacturer.
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.
What is the lower limit of the 95%confidence interval?
What is the upperlimit of the 95% confidenceinterval
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Making Hard Decisions with decision tools
Authors: Robert Clemen, Terence Reilly
3rd edition
538797576, 978-0538797573
