At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with mean of 22 minutes and a standard deviation of 2 minutes. If you visit that restaurant 28 this year, what is the expected number of times that you would expect to wait between 19 minutes and 26 minutes, to the nearest whole number? In an all boys school, the heights of the student body are normally distributed with a mean of 70 inches and a standard deviation of 2 inches. Out of the 1390 boys who go to that school, how many would be expected to be taller than 72 inches tall, to the nearest whole number? When Hassan commutes to work, the amount of time it takes him to arrive is normally distributed with a mean of 45 minutes and a standard deviation of 4.5 minutes. What percentage of his commutes will be shorter than 38 minutes, to the nearest tenth? On a standardized exam, the scores are normally distributed with a mean of 300 and a standard deviation of 25. Find the z-score of a person who scored 230 on the exam. The weight of orange growing in an orchard is normally distributed with a mean weight of 7.5 oz. and a standard deviation of 1 oz. What is the probability that a randomly selected orange from the orchard weight between 6 oz. and 8 oz., to the nearest thousandth? On a standard exam, the scores are normally distributed with a mean of 750 and a standard deviation of 40. Find the z-score of a person who scored 690 on the exam