[Solution Library] A light-bulb manufacturer advertises that the average life for its light bulbs 900 hours. A random sample of 15 of its light bulbs resulted in
Question: A light-bulb manufacturer advertises that the average life for its light bulbs 900 hours. A random sample of 15 of its light bulbs resulted in the following lives in hours.
At the \(10 \%\) significance level, do the data provide evidence that the mean life for the company's light bulbs differs from the advertised mean?
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