Question
A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner selects 25 bulbs and finds the mean lifetime to
A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner selects 25 bulbs and finds the mean lifetime to be 980 hours. Population standard deviation is 80 hours. If = 0.05, test the manufacturer's claim using P-values. Assume the population has a normal distribution.
Does your decision support the manufacturer's claim?
A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner selects 25 bulbs and finds the mean lifetime to be 980 hours. Population standard deviation is 80 hours. If = 0.05, test the manufacturer's claim using P-values. Assume the population has a normal distribution.
Does your decision support the manufacturer's claim?
Yes
No
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A Survey Of Mathematics With Applications
Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde
11th Edition
0135740460, 978-0135740460
