Question: The lengths of life in hours of a sample of
The lengths of life (in hours) of a sample of 40 20 watt compact fluorescent light bulbs produced by manufacturer A and a sample of 40 20 watt compact fluorescent light bulbs produced by manufacturer B are stored in Bulbs . Completely analyze the differences between the lengths of life of the compact fluorescent light bulbs produced by the two manufacturers. (Use a = 0.05.)
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