Questions from Business Statistics

Q: A study by the Pew Internet & American Life Project found that

A study by the Pew Internet & American Life Project found that 78% of U.S. residents over 16 years old read a book in the past 12 months. They also found that 21% had read an e-book using a reader or...

Q: You pick a card from a standard deck and record its denomination

You pick a card from a standard deck and record its denomination (7, say) and its suit (maybe spades). 1. Is the variable suit categorical or quantitative? 2. Name a game you might be playing for whic...

Q: Progressive Insurance asked customers who had been involved in auto accidents how

Progressive Insurance asked customers who had been involved in auto accidents how far they were from home when the accident happened. The data are summarized in the table. 1. Create an appropriate gra...

Q: In an investigation of environmental causes of disease, data were collected

In an investigation of environmental causes of disease, data were collected on the annual mortality rate (deaths per 100,000) for males in 61 large towns in England and Wales. In addition, the water h...

Q: The dataset from England and Wales also notes for each town whether

The dataset from England and Wales also notes for each town whether it was south or north of Derby. Here are some summary statistics and a comparative boxplot for the two regions. 1. What is the overa...

Q: Which of these scatterplots show 1. little or no association

Which of these scatterplots show 1. little or no association? 2. a negative association? 3. a linear association? 4. a moderately strong association? 5. a very strong association?

Q: The Framingham Heart Study recorded the cholesterol levels of more than 1400

The Framingham Heart Study recorded the cholesterol levels of more than 1400 participants. (Data in Framingham) Here is an ogive of the distribution of these cholesterol measures. (An ogive shows the...

Q: Average daily temperatures in January and July for 60 large U.

Average daily temperatures in January and July for 60 large U.S. cities are graphed in the histograms below. (Data in City climate) 1. What aspect of these histograms makes it difficult to compare the...

Q: It is a common belief that Yellowstone most famous geyser erupts once

It is a common belief that Yellowstone most famous geyser erupts once an hour at very predictable intervals. The histogram below shows the time gaps (in minutes) between 222 successive eruptions. Desc...

Q: Does the duration of an eruption have an effect on the length

Does the duration of an eruption have an effect on the length of time that elapses before the next eruption? 1. The histogram below shows the duration (in minutes) of those 222 eruptions. Describe thi...