Mathematics, 25.10.2021 18:00 dontcareanyonemo

the quality control manger wishes to use a new delivery system designed to get cars through the drive thru system faster. A random sample of 40 cars results in a sample mean time spent at the window of 56.8 seconds. What is the probability of obtaining a sample mean of 56.8 seconds or less, assuming that the population mean is 59.3 seconds

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