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Mathematics, 11.04.2020 03:47 ashleyvalles16
Seams Personal advertises on its website that 95% of customer orders are received within four working days. They performed an audit from a random sample of 500 of the 6,000 orders received that month and it shows 470 orders were received on time.
Part A: Can we use a normal approximation? Explain. (5 points)
Part B: If Seams Personal customers really receive 95% of their orders within four working days, what is the probability that the proportion in the random sample of 500 orders is the same as the proportion found in the audit sample or less?
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