The manufacturer of an electrical fuse claims that the fuse's link will break with a 10% electrical overload within 11 minutes. Independent tests on a random sampling of 20 fuses showed the mean time for link breakage was 9.5 minutes with a standard deviation of 3.2 minutes. Does the sampling support the manufacturer's claim?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The manufacturer of an electrical fuse claims that the fuse's link will break with a 10% electrical overload within 11 minutes. Independent tests on a random
sampling of 20 fuses showed the mean time for link breakage was 9.5 minutes with a standard deviation of 3.2 minutes. Does the sampling support the
manufacturer's claim?
Transcribed Image Text:The manufacturer of an electrical fuse claims that the fuse's link will break with a 10% electrical overload within 11 minutes. Independent tests on a random sampling of 20 fuses showed the mean time for link breakage was 9.5 minutes with a standard deviation of 3.2 minutes. Does the sampling support the manufacturer's claim?
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