Question
A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours. To test this claim, a reputable
A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours. To test this claim, a reputable testing firm took a random sample of 100 bulbs and life tested them. The testing firm found the average life of the sample to be 4500 hours with a sample standard deviation, s = 400 hours.
The value of the test statistic for this problem is
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Big Ideas MATH Algebra 2
Authors: Ron Larson, Laurie Boswell
Common Core Curriculum
160840840X, 978-1608408405
