Questions from Business Statistics

Q: One theory about the daily changes in the closing price of a

One theory about the daily changes in the closing price of a stock is that these changes follow a random walk-that is, these daily events are independent of each other and move upward or downward in a...

Q: Bring to class a chart from a website, newspaper, or

Bring to class a chart from a website, newspaper, or magazine published recently that you believe to be a poorly drawn representation of a numerical variable. Be prepared to submit the chart to the in...

Q: Using the data of Problem 15.4, stored in Domestic

Using the data of Problem 15.4, stored in Domestic Beer, perform a natural logarithmic transformation of the dependent variable (calories). Using the transformed dependent variable and the percentage...

Q: Deanna Oxender Burgess of Florida Gulf Coast University conducted research about corporate

Deanna Oxender Burgess of Florida Gulf Coast University conducted research about corporate annual reports (see D. Rosato, "Worried About Corporate Numbers? How About the Charts?" nyti.ms/2Ged1Qu). Bur...

Q: College basketball in the United States is big business with television contracts

College basketball in the United States is big business with television contracts in the billions of dollars and coaches' salaries in the millions of dollars. The file Coaches Pay contains the total c...

Q: Webrooming, researching products online before buying them in store, has

Webrooming, researching products online before buying them in store, has become the new norm for some consumers and contrasts with showrooming, researching products in a physical store before purchasi...

Q: Medical wires are used in the manufacture of cardiovascular devices. A

Medical wires are used in the manufacture of cardiovascular devices. A study was conducted to determine the effect of several factors on the ratio of the load on a test specimen (YS) to the ultimate t...

Q: In 2016 through 2018, the value of precious metals fluctuated greatly

In 2016 through 2018, the value of precious metals fluctuated greatly. The data (stored in Metals) represent the total rate of return (in percentage) for platinum, gold, and silver from 2016 through 2...

Q: Suppose that, when setting up the experiment in Problem 11.

Suppose that, when setting up the experiment in Problem 11.38, the operations manager is able to study the effect of side-to-side aspect in addition to air-jet pressure. Thus, instead of the one-facto...

Q: How much time do commuters living in or near cities spend commuting

How much time do commuters living in or near cities spend commuting to work each week? The file Commuting Time contains the average weekly commuting time in 30 U.S. cities. Source: Data extracted from...