standard deviation

standard deviation

The number of meals served in a week at Cath’s Café is Normally distributed with a mean of 6,000 and a standard deviation of 600. What is the probability that in a given week the number of meals served is less than 5,000? What is the probability that more than 7,500 meals are served? What is the probability that between 5,500 and 6,500 are served? There is a 90% chance that the number of meals served in a week exceeds what value? There is a 90% chance that the number of meals served will fall within what range?

standard deviation