Questions from Applied Statistics

Q: Passengers using New York’s MetroCard system must swipe the card at a

Passengers using New York’s MetroCard system must swipe the card at a rate between 10 and 40 inches per second, or else the card must be re-swiped through the card reader. Research shows that actual s...

Q: Tired of careless spelling and grammar, a company decides to administer

Tired of careless spelling and grammar, a company decides to administer a test to all job applicants. The test consists of 20 sentences. Applicants must state whether each sentence contains any gramma...

Q: The default rate on government-guaranteed student loans at a certain

The default rate on government-guaranteed student loans at a certain private 4-year institution is 7 percent. The college extends 10 such loans. (a) What is the probability that none of them will defa...

Q: The weekly demand for Papa Chubby’s pizzas on a Friday night is

The weekly demand for Papa Chubby’s pizzas on a Friday night is a random variable with mean 235 and standard deviation 10. Find the value(s) of X for each event. Show your work. a. Lowest 50 percent...

Q: The amounts spent by customers at a Noodles & Company restaurant during

The amounts spent by customers at a Noodles & Company restaurant during lunch are normally distributed with a mean equal to $7.00 and a standard deviation equal to $0.35. (a) What amount is the first...

Q: The length of a Colorado brook trout is normally distributed. (

The length of a Colorado brook trout is normally distributed. (a) What is the probability that a brook trout’s length exceeds the mean? (b) Exceeds the mean by at least 1 standard deviation? (c) Excee...

Q: A small feeder airline knows that the probability is .10 that

A small feeder airline knows that the probability is .10 that a reservation holder will not show up for its daily 7:15 a.m. flight into a hub airport. The flight carries 10 passengers. (a) If the flig...

Q: Although television HDTV converters are tested before they are placed in the

Although television HDTV converters are tested before they are placed in the installer’s truck, the installer knows that 20 percent of them still won’t work properly. The driver must install eight con...

Q: Chlorine concentration in a municipal water supply is a uniformly distributed random

Chlorine concentration in a municipal water supply is a uniformly distributed random variable that ranges between 0.74 ppm and 0.98 ppm. (a) What is the mean chlorine concentration? (b) The standard...

Q: A statistics textbook chapter contains 60 exercises, 6 of which are

A statistics textbook chapter contains 60 exercises, 6 of which are essay questions. A student is assigned 10 problems. Define X to be the number of essay questions the student receives. (a) Use Excel...