Mathematics, 29.11.2021 23:50 ctyrector
A manufacturer of light bulbs advertises that, on average, its long-life bulb will last more than 4800 hours. To test this claim, a statistician took a random sample of 103 bulbs and measured the amount of time until each bulb burned out. The mean lifetime of the sample of bulbs is 4887 hours and has a standard deviation of 380 hours. Can we conclude with 90% confidence that the claim is true? Fill in the requested information below.
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A manufacturer of light bulbs advertises that, on average, its long-life bulb will last more than 48...
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