TABLE 13-9 It Is Believed That, the Average Numbers of Hours Spent

question 83

Multiple Choice

TABLE 13-9
It is believed that, the average numbers of hours spent studying per day (HOURS) during undergraduate education should have a positive linear relationship with the starting salary (SALARY, measured in thousands of dollars per month) after graduation. Given below is the Excel output for predicting starting salary (Y) using number of hours spent studying per day (X) for a sample of 51 students. NOTE: Only partial output is shown.

Note: 2.051E - 05 = 2.051*10⁻⁰⁵ and 5.944E - 18 = 5.944*10⁻¹⁸.
-Referring to Table 13-9, the 90% confidence interval for the average change in SALARY (in thousands of dollars) as a result of spending an extra hour per day studying is

• A) wider than [-2.70159, -1.08654].
• B) narrower than [-2.70159, -1.08654].
• C) wider than [0.8321927, 1.12697].
• D) narrower than [0.8321927, 1.12697].

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Definitions:

Profit Center

A department or segment of a business responsible for generating its own revenue and profit.

Minimizing Costs

The process of reducing expenses to the lowest possible level while maintaining efficiency and effectiveness.

Maximizing Profits

The process or strategy of adjusting operations, costs, and pricing to achieve the highest possible return or net income.

Division Revenues

The total amount of income generated by a specific division or section of a company through its operations and sales.