Questions from Business Statistics

Q: An appliance manufacturer stockpiles washers and dryers in a large warehouse for

An appliance manufacturer stockpiles washers and dryers in a large warehouse for shipment to retail stores. Sometimes in handling them the appliances get damaged. Even though the damage may be minor,...

Q: A national vital statistics report indicated that about 3% of all

A national vital statistics report indicated that about 3% of all births produced twins. Is the rate of twin births the same among very young mothers? Data from a large city hospital found that only 7...

Q: Exercise 64 looked at distances PGA golfers can hit the ball.

Exercise 64 looked at distances PGA golfers can hit the ball. The standard deviation of these average drive distances is 11.2 yards, and the quartiles are Q1=282.05 yards and Q3=294.5 yards. 1. Write...

Q: During the first 15 weeks of the 2016 season, the home

During the first 15 weeks of the 2016 season, the home team won 137 of the 238 regular-season National Football League games. Is this strong evidence of a home field advantage in professional football...

Q: A magazine is considering the launch of an online edition. The

A magazine is considering the launch of an online edition. The magazine plans to go ahead only if it convinced that more than 25% of current readers would subscribe. The magazine contacted a Simple Ra...

Q: A garden center wants to store leftover packets of vegetable seeds for

A garden center wants to store leftover packets of vegetable seeds for sale the following spring, but the center is concerned that the seeds may not germinate at the same rate a year later. The manage...

Q: A company is criticized because only 13 of 43 people in executive

A company is criticized because only 13 of 43 people in executive-level positions are women. The company explains that although this proportion is lower than it might wish, it not a surprising value g...

Q: Census data for a certain county show that 19% of the

Census data for a certain county show that 19% of the adult residents are Hispanic. Suppose 72 people are called for jury duty and only 9 of them are Hispanic. Does this apparent underrepresentation o...

Q: Some people are concerned that new tougher standards and high-stakes

Some people are concerned that new tougher standards and high-stakes tests adopted in many states have driven up the high school dropout rate. The National Center for Education Statistics reported tha...

Q: A study of the effects of acid rain on trees in the

A study of the effects of acid rain on trees in the Hopkins Forest shows that 25 of 100 trees sampled exhibited some sort of damage from acid rain. This rate seemed to be higher than the 15% quoted in...