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Suppose you learn that 5.05% of American households spend less than $1000 for daily transportation. What is the standard deviation of the amount spent?
The Broadmoor Hotel in Colorado Springs contains 700 rooms and is on the 2004 Gold List (Conde Nast Traveler, January 2004).
Ward Doering Auto Sales is considering offering a speical service contract that will cover the total cost of an service work required on leased vehicles.
What is the probability the number of fatal crashes will be between 1,000 and 2,000 for a year (to 4 decimals)?
Assume that the test scores from a college admissions test are normally distributed, with a mean of 450 and a standard deviation of 100.
How much would a brand manager in Los Angeles have to make in order to have a higher salary than 99% of the brand managers in Houston?
A machine fills containers with a particular product. The standard deviation of filling weights is known from past data to be 6 ounces.
What is the probabilty that a worker uses an office computer for holiday shopping between 4 and 8 hours?
The website for the Bed and Breakfast Inns of North America gets approximately seven visitors per minute.
Assume the exponential probability distribution is applicable and show the probability density function for the travel time to work for a resident of this city.
The time (in minutes) between telephone calls at an insurance claims office has the following exponential probability distribution.
Use the sales forecaster's, predictions to describe a normal probability distribution that can be used to approximate the demand distribution.
Assume that the probability distribution for minutes of programming can be approximated by a uniform distribution from 18 minutes to 26 minutes.
Suppose we are interested in bidding on a piece of land and we know one other bidder is interested.
What is the probability that the debt for a borrower with good credit is between $12,000 and $18,000?
If the average stock price for companies making up the S&P 500 is $30 and the standard deviation is $8.20 and the prices are normally distributed.
If the cost to a patient is in the lower 8% of charges for this medical service, what was the cost of this patient's emergency room visit?
In January 2003. the American worker spent an average of 77 hours logged on to the Internet while at work (CNBC, March 15, 2003).
A person must score in the upper 2% of the population on an IQ test to qualify for membership in Mensa, the international high- IQ society.
What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
Doctors suggest getting between 7 and 9 hours of sleep each night. What percentage of the population gets this much sleep?
Many companies use a quality control technique called acceptance sampling to monitor incoming shipments of parts, raw materials, and so on.
What are the variance and standard deviation of the number of people who are unemployed?
A poll conducted by Zogby International showed that of those Americans who said music plays a "very important" role in their lives.
What is the probability that more than 5 but less than 10 cars will arrive during any given 40 minutes of operation?