SOLUTION: As estimate of the mean time of continuous use until an
answering machine will first require service is desired. If
it can be assumed that α = 60 days, how large a sample
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-> SOLUTION: As estimate of the mean time of continuous use until an
answering machine will first require service is desired. If
it can be assumed that α = 60 days, how large a sample
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Question 1011275: As estimate of the mean time of continuous use until an
answering machine will first require service is desired. If
it can be assumed that α = 60 days, how large a sample
is needed so that one will be able to assert with 90%
confidence that the sample mean is off by at most 10
days? Answer by ikleyn(52780) (Show Source):
