An online retailer claims that 90% of all orders are shipped within 12 hours of being received. A consumer group placed 121 orders of different sizes and at different times of day. The probability that the sample proportion of orders shipped within 12 hours is is less than 0.86 is: 0.0554 0.0708 0.1853 0.1997 0.0621
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The population of interest is all orders placed with the online retailer. The parameter of interest is the proportion of orders shipped within 12 hours. Show more…
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