TABLE 13-11 A Computer Software Developer Would Like to Use the Number

question 20

Short Answer

TABLE 13-11
A computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amount of revenue (in thousands of dollars) he can make on the full version of the new shareware. Following is the output from a simple linear regression along with the residual plot and normal probability plot obtained from a data set of 30 different sharewares that he has developed:



-Referring to Table 13-11, what is the value of the test statistic for testing whether there is a linear relationship between revenue and the number of downloads?

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Definitions:

Energy Efficiency

The goal of using less energy to provide the same level of energy service, such as lighting, heating, or cooling.

Economic Growth

An increase in the production of goods and services in an economy over a period of time.

Imported Energy

Energy that is produced outside of a region or country and then transported into that area for use.

Source Of Ethanol

Ethanol, a biofuel, is primarily produced through the fermentation of sugars by yeast, obtained from crops like sugarcane, corn, and wheat.