What is the z score for given income
Suppose the monthly income of assistant managers of our local banks are normally distributed with mean of 40,000 and a standard deviation of 5,000. What is the z score for an income of 42,000?
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The daily amount of coffee, in liters, dispensed by a machine located in an airport, lobby is a random variable X having a continuous uniform distribution with A = 7 and B = 10. Find the probability that on a given day the amount, of coffee dispen
Consider the normal distribution of IQs with mean of 100 and a standard deviation of 16. What percentage of IQs are less than 120?
Your consulting company has been hired by an airline to analyze data on passenger and luggage weights. The data refer to a 200 seat aircraft that is always full.
One-sixth of the male freshmen entering a large state school are out-of-state students. If the students are assigned at random to the dormitories, 180 to a building, what is the probability that in a given dormitory at least one-fifth of the stude
Product filling weights are normally distributed with a mean of 350 grams and a standard deviation of 15 grams.
Statistics released by the National Highway Traffic Safety Administration and the National Safety Council show that on an average weekend night, 1 out of every 10 drivers on the road is drunk. If 400 drivers are randomly checked next Saturday nigh
The mass of a small loaf of bread is normally distributed with mean 500 grams and standard deviation of 20 grams. Find the probability that a randomly selected loaf has a mass at least 510g.
According to the Sleep Foundation, the average night's sleep is 6.8 hours (Fortune, March 20, 2006). Assume the standard deviation is .6 hours and that the probability distribution is normal.
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