The Sample Standard Deviation of the Monthly Sales (In Thousands

question 59

Essay

The sample standard deviation of the monthly sales (in thousands of dollars)of a telecommunications firm in U.S.for two years,2010 and 2011,is computed as 6.7.Assuming that the sales data are drawn from a normally distributed population,conduct the following hypothesis tests for the population variance.Use the critical value approach at α = 0.05.
A) b.

• A) b.

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Definitions:

Fixed Expenses

Expenses that remain constant regardless of production or sales volume, including items like lease payments, employee wages, and insurance costs.

Financial Advantage

The benefit gained from making economic decisions that result in increased wealth or financial health.

Average Cost

A method of cost valuation that calculates the cost of goods sold and inventory based on the average cost of all similar items in inventory.

Fixed Manufacturing Overhead

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