Two Independent Samples of Sizes 20 and 30 Are Randomly

question 18

Multiple Choice

Two independent samples of sizes 20 and 30 are randomly selected from two normally distributed populations.Assume that the population variances are unknown but equal.In order to test the difference between the population means, ,the sampling distribution of the sample mean difference, ,is:

• A) normal.
• B) Student-t with 50 degrees of freedom.
• C) Student-t with 48 degrees of freedom.
• D) None of these choices.

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Definitions:

Net Operating Income

The profit generated from a business's normal core operations, excluding deductions of interest and taxes.

Variable Costing

An accounting method that only includes variable production costs—direct materials, direct labor, and variable manufacturing overhead—in product cost.

Unit Product Cost

Unit product cost is the total expense incurred to produce, assemble, and prepare a single unit for sale, encompassing both direct costs and allocated overheads.

Absorption Costing

An accounting method that includes both variable and fixed manufacturing costs in the cost of a product, used for external reporting.