Questions from Business Statistics

Q: Purchases made at small “corner stores” were studied by the

Purchases made at small “corner stores” were studied by the authors of the paper “changes in Quantity, Spending, and nutritional characteristics of Adult, Adolescent and child urban corner Store Purch...

Q: The paper referenced in Example 6.21 suggested that a normal

The paper referenced in Example 6.21 suggested that a normal distribution with mean 3500 grams and standard deviation 550 grams is a reasonable model for birth weights of babies born in Canada. a. On...

Q: The time that it takes a randomly selected job applicant to perform

The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated by a normal distribution with a mean of 120 seconds and a standard deviat...

Q: The paper “examining communication- and mediabased recreational Sedentary behaviors Among

The paper “examining communication- and mediabased recreational Sedentary behaviors Among canadian youth: results from the comPASS Study” (Preventive Medicine [2015]: 74–80) estimated that the time sp...

Q: A machine that produces ball bearings has initially been set so that

A machine that produces ball bearings has initially been set so that the mean diameter of the bearings it produces is 0.500 inches. A bearing is acceptable if its diameter is within 0.004 inches of th...

Q: The paper referenced in Example 6.24 (“estimating waste transfer

The paper referenced in Example 6.24 (“estimating waste transfer Station delays using gPS,” Waste Management [2008]: 1742–1750) describing processing times for garbage trucks also provided information...

Q: The number of vehicles leaving a highway at a certain exit during

The number of vehicles leaving a highway at a certain exit during a particular time period has a distribution that is approximately normal with mean value 500 and standard deviation 75. What is the pr...

Q: A pizza company advertises that it puts 0.5 pound of

A pizza company advertises that it puts 0.5 pound of real mozzarella cheese on its medium-sized pizzas. In fact, the amount of cheese on a randomly selected medium pizza is normally distributed with a...

Q: Suppose that fuel efficiency (miles per gallon, mpg) for

Suppose that fuel efficiency (miles per gallon, mpg) for a particular car model under specified conditions is normally distributed with a mean value of 30.0 mpg and a standard deviation of 1.2 mpg. a...

Q: Suppose that the amount of time spent by a statistical consultant with

Suppose that the amount of time spent by a statistical consultant with a client at their first meeting is a random variable that has a normal distribution with a mean value of 60 minutes and a standar...