TABLE 12-11 A Computer Software Developer Would Like to Use the Number

question 14

Short Answer

TABLE 12-11
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 12-11, 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:

Industrialized Countries

Nations characterized by a significant level of industrial activity, high standards of living, and well-developed infrastructure.

Defensive Medicine

The recommendation by physicians of more tests and procedures than are warranted medically or economically as a way of protecting themselves against later malpractice suits.

Preventive Medicine

The branch of medicine focused on preventing disease and maintaining health, rather than treating illnesses after they develop.

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Employees who work fewer hours than the full-time hours specified by an employer, often leading to flexible schedules.