Exhibit 8-1 in Order to Estimate the Average Time Spent on the on the Computer

question 61

Multiple Choice

Exhibit 8-1
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours.
-Refer to Exhibit 8-1. If the sample mean is 9 hours, then the 95% confidence interval is

• A)7.04 to 110.96 hours
• B)7.36 to 10.64 hours
• C)7.80 to 10.20 hours
• D)8.61 to 9.39 hours

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Definitions:

Variable Costing

An accounting method that charges all variable production costs directly to the cost of production, excluding fixed overhead costs from product costing.

Fixed Manufacturing Overhead

Costs associated with manufacturing that do not vary with the level of production, such as rent, salaries of managers, and depreciation of equipment.

Absorption Costing

A costing method that includes all manufacturing costs - direct materials, direct labor, and both variable and fixed overheads - in the cost of a unit of product.

Variable Costing

A costing method that includes only variable production costs—direct materials, direct labor, and variable manufacturing overhead—in the cost of goods sold and reports fixed overhead as an expense of the period.