In Testing the Difference Between the Means of Two Normal

question 76

Short Answer

In testing the difference between the means of two normal populations with known population standard deviations the test statistic calculated from two independent random samples equals 2.56. If the test is two-tailed and the 1% level of significance has been specified, the conclusion should be: $\begin{array}{|l|l|}\hline A.&\text {to reject the null hypothesis. }\\\hline B.&\text {not to reject the null hypothesis. }\\\hline C.&\text { the test is inconclusive.}\\\hline D.&\text {None of these choices are correct. }\\\hline \end{array}$

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Definitions:

Industry Concentration

A measure of the extent to which a small number of firms dominate the total production, sales, or market share in an industry.

Elastic

A measure in economics indicating how much the demand or supply of a good changes in response to a change in price.

Marginal Revenue

The extra revenue gained by selling an additional unit of a product or service.