A company produces industrial wiring. One batch of wiring is specified to be 2.16 centimeters (cm) thick.
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A company produces industrial wiring. One batch of wiring is specified to be 2.16 centimeters (cm) thick. A company inspects the wiring in seven locations and determines that, on the average, the wiring is about 2.16 cm thick. However, the measurements vary. It is unacceptable for the variance of the wiring to be more than .04 cm2. The standard deviation of the seven measurements on this batch of wiring is .34 cm. Use α = .01 to determine whether the variance on the sample wiring is too great to meet specifications. Assume wiring thickness is normally distributed.
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Related Book For
Business Statistics for Contemporary Decision Making
ISBN: 978-0470910184
6th Edition
Authors: Ken Black
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