The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%. (a) What.
The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%. (a) What is the approximate probability that the sample mean tip percentage for a random sample of 40 bills is between 16 and 19%? (b) If the sample size had been 15 rather than 40, could the probability requested in part (a) be calculated from the given information? What is the approximate value of the 95th percentile for the total amount purchased by 50 randomly selected customers? Apr 08 2022 03:22 PM
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