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Eighty randomly selected compact fluorescent lightbulbs were tested to determine their lifetimes (in hours). The frequency distribution was obtained as shown: Class Frequency 651-800 6

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Eighty randomly selected compact fluorescent lightbulbs were tested to determine their lifetimes (in hours). The frequency distribution was obtained as shown: Class Frequency 651-800 6 12 801-950 951-1100 1101-1250 1251-1400 1401-1550 25 18 5 What is the approximate mean of the data set

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