AAA batteries produced by one of the northern manufacturers are known to have an average life of 55 hours with a standar

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AAA batteries produced by one of the northern manufacturers areknown to have an average life of 55 hours with a standard deviationof 6 hours. Use Chebyshev’s theorem to find an intervalfor the lives of the batteries that will be true for at least80% of the batteries
45.2 and 64.8
41.6 and 68.4
49 and 61
48.5 and 62.5