A Random Sample of 79 Companies from the Forbes 500

question 81

Multiple Choice

A random sample of 79 companies from the Forbes 500 list (which actually consists of nearly 800 companies) was selected,and the relationship between sales (in hundreds of thousands of dollars) and profits (in hundreds of thousands of dollars) was investigated by regression.The following results were obtained from statistical software. Suppose the researchers conducting this study wish to estimate the profits (in hundreds of thousands of dollars) for companies that had sales (in hundreds of thousands of dollars) of 500.The following results were obtained from statistical software. If the researchers wish to estimate the mean profits for all companies that had sales of 500,what would be a 95% confidence interval for the mean profits?

• A)(-1066.4,805.6)
• B)(-248.5,-12.3)
• C)-130.4 ± 59.3
• D)500 ± 59.3

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Definitions:

Employee Productivity

A measure of the efficiency and effectiveness with which employees perform their tasks, often evaluated to improve business operations.

Smaller Screen

Pertains to devices with compact display areas, often affecting user interaction and content visibility.

Clarity

The quality of being clear, understandable, and transparent in communication or presentation.

Mobile Devices

Portable electronic devices such as smartphones and tablets that have computing capabilities and can access the internet.