Question
1 The average life of a bread machine is 7 years, with a standard deviation of 1 year. Assuming that the life of these machines
1 The average life of a bread machine is 7 years, with a standard deviation of 1 year. Assuming that the life of these machines follows approximately a normal distribution, what is the probability that the mean life of a random sample of 9 of these machines falls between 6.4 and 7.2 years?
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Algebra (subscription)
Authors: Elayn Martin Gay
6th Edition
0135176301, 9780135176306
