In Order to Estimate the Difference Between the Average Hourly

question 19

Multiple Choice

In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been gathered. $\begin{array}{lll}& \text { Downtown Store } & \text { North Mall Store } \\ \text { Sample size } & 25 & 20 \\\text { Sample mean }& \$ 9 & \$ 8 \\\text { Sample standard deviation } & \$ 2 & \$ 1\end{array}$ A point estimate for the difference between the two population means is

• A) 1.
• B) 2.
• C) 3.
• D) 4.

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Definitions:

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Electrical appliances used for heating and cooking food through the use of microwave radiation.

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The sum of all costs that vary with output level in the production of goods or services.

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The sum of all costs that vary with the level of production, such as materials and labor costs.