Mathematics, 17.05.2021 16:10 yialefi

A factory produces plastic cell phone cases. To fit properly, each case must have a width between 53.5 and 54.5 millimeters. The quality control manager for the factory collects a random sample of 100 cases and determines that the widths are normally distributed, with a mean width of 54.2 millimeters and a standard deviation of 0.3 millimeter.

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