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The batteries produced in a manufacturing plant have a mean time to failure of 30 months, with a standard deviation of 2 months. A simple

  1. The batteries produced in a manufacturing plant have a mean time to failure of 30 months, with a standard deviation of 2 months. A simple random sample of 1600 batteries produced in the manufacturing plant is selected and each is tested and the time to failure is recorded. The sample averageis calculated. The probability thatis less than 29.9 is:

A.0.9772.B.0.0228.C.0.4801.D.0.0000.

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