Mathematics, 11.12.2019 23:31 huckfin58021219

Among 100 vacuum tubes tested, 41 had lifetimes of less than 30 hours, 31 had lifetimes between 30 and 60 hours, 13 had lifetimes between 60 and 90 hours, and 15 had lifetimes of greater than 90 hours. are these data consistent with the hypothesis that a vacuum tube's lifetime is exponentially distributed with a mean of 50 hours

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