Questions from Applied Statistics

Q: A ski company in Vail owns two ski shops, one on

A ski company in Vail owns two ski shops, one on the east side and one on the west side. Sales data showed that at the eastern location there were 56 pairs of large gloves sold out of 304 total pairs...

Q: At a University of Colorado woman’s home basketball game, a random

At a University of Colorado woman’s home basketball game, a random sample of 25 concession purchases showed a mean of $7.12 with a standard deviation of $2.14. For the next week’s home game, the admis...

Q: Vail Resorts tracks the proportion of seasonal employees who are rehired each

Vail Resorts tracks the proportion of seasonal employees who are rehired each season. Rehiring a seasonal employee is beneficial in many ways, including lowering the costs incurred during the hiring p...

Q: Does a “follow-up reminder” increase the renewal rate

Does a “follow-up reminder” increase the renewal rate on a magazine subscription? A magazine sent out 760 subscription renewal notices (without a reminder) and got 703 renewals. As an experiment, they...

Q: A study revealed that the 30-day readmission rate was 31

A study revealed that the 30-day readmission rate was 31.5 percent for 400 patients who received after-hospital care instructions (e.g., how to take their medications) compared to a readmission rate o...

Q: In a marketing class, 44 student members of virtual (Internet

In a marketing class, 44 student members of virtual (Internet) project teams (group 1) and 42 members of face-to-face project teams (group 2) were asked to respond on a 1–5 scale to the question: “As...

Q: In San Francisco, a sample of 3,200 wireless routers

In San Francisco, a sample of 3,200 wireless routers showed that 1,312 used encryption (to prevent hackers from intercepting information). In Seattle, a sample of 1,800 wireless routers showed that 68...

Q: Former U.S. Vice President Dick Cheney received a lot

Former U.S. Vice President Dick Cheney received a lot of publicity after his fourth heart attack. A portable defibrillator was surgically implanted in his chest to deliver an electric shock to restore...

Q: In 2009 Noodles & Company introduced spaghetti and meatballs to their menu

In 2009 Noodles & Company introduced spaghetti and meatballs to their menu. Before putting it on the menu, they performed taste tests to determine the best-tasting spaghetti sauce. In a paired compari...

Q: Has the cost to outsource a standard employee background check changed?

Has the cost to outsource a standard employee background check changed? A random sample of 10 companies in spring 2010 showed a sample average of $105 with a sample standard deviation equal to $32. A...