An online retailer claims that 95% of all orders are shipped…
An online retailer claims that 95% of all orders are shipped within 12 hours of being received. A consumer group placed 300 orders of different sizes and at different times of the day; 276 orders were shipped within 12 hours. Assuming the retailers claim is true, find the probability that a sample of 300 orders would produce a sample proportion lower than the one observed in this sample.