A manufacturer of cereal has a machine that, when working properly, puts 20 ounces of cereal ...
guru2009 (Not rated)
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A manufacturer of cereal has a machine that, when working properly, puts 20 ounces of cereal on average into a box with a standard deviation of 1 ounce. Every morning workers weigh 25 filled boxes. If the average weight is off by more than 1 percent from the desired 20 ounces per box, company policy requires them to rec-callibrate the machine.
In a sample of 100 days where the machine is working properly all day, on how many of the days is it expected the machine will be re-calibrated?
8 years ago
μ = 20, σ = 1, n = 25 1% of 20 = 0.2 ...
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