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A factory that manufactures bolts is performing a quality control experiment. Each object should have a length of 13 centimeters. The factory believes that the

A factory that manufactures bolts is performing a quality control experiment. Each object should have a length of 13 centimeters. The factory believes that the length of the bolts exceeds this value and measures the length of 81 bolts. The sample mean bolt length was 13.06 centimeters. The population standard deviation is known to be o = 0.22 centimeters.

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