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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 13PPS

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The lifespan of xenon metal halide arc-discharge bulbs for aircraft landing lights is normally distributed with a mean
of 2,000 hours and a standard deviation of 460 hours.
(a) if a new ballast system shows a mean life of 2.152 hours in a test on a sample of 12 prototype new bulbs, would
you conclude that the new lamp's mean life exceeds the current mean life at a = 0.02?
Yes
No
(b) What is the p-value? (Round your answer to 4 decimal places.)
p-value

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