Questions from Business Statistics

Q: Using the data from Table 3.8.4 in Chapter

Using the data from Table 3.8.4 in Chapter 3, for the market values of the portfolio investments of College Retirement Equities Growth Fund in the media sector: a. Find the average market value for th...

Q: Consider the running times of selected films from a video library as

Consider the running times of selected films from a video library as shown in Table 4.3.10. a. Find the average running time. b. Find the median running time. c. Which is larger, the average or the me...

Q: A wine store carries 86 types of wine produced in 2007,

A wine store carries 86 types of wine produced in 2007, 125 types from 2008, 73 from 2009, and 22 from 2010. Identify the types of wine as the elementary units for analysis. a. Find the mode of the ye...

Q: Consider the profits of health care companies in the Fortune 500,

Consider the profits of health care companies in the Fortune 500, as shown in Table 4.3.3 a. Draw a histogram of this data set, and briefly describe the shape of the distribution. b. Find the profit o...

Q: The beta of a firm’s stock indicates the degree to which changes

The beta of a firm’s stock indicates the degree to which changes in stock price track changes in the stock market as a whole and is interpreted as the market risk of the portfolio. A beta of 1.0 indic...

Q: Planning to start an advertising agency? Table 5.5.

Planning to start an advertising agency? Table 5.5.1 reports the size of account budgets, within the Internet category, for selected firms. a. Find the average budget size. b. Find the standard deviat...

Q: Consider the number of gifts (lifetime gifts, previous to this

Consider the number of gifts (lifetime gifts, previous to this mailing) given by the 20,000 people represented in the donations database (on the companion site). a. Find the average and standard devia...

Q: Consider the prediction of annual salary from age alone (as compared

Consider the prediction of annual salary from age alone (as compared to exercise 1, where experience was also used as an X variable). a. Find the regression equation to predict annual salary from age....

Q: Let us compare the distribution of the number of lifetime gifts of

Let us compare the distribution of the number of lifetime gifts of those who made a current donation to that of those who did not. We will use two data sets, each indicating the number of gifts (life...

Q: You have been trying to control the weight of a chocolate and

You have been trying to control the weight of a chocolate and peanut butter candy bar by intervening in the production process. Table 5.5.4 shows the weights of two representative samples of candy bar...