Two Independent Samples of Sizes 20 and 25 Are Randomly

question 44

Multiple Choice

Two independent samples of sizes 20 and 25 are randomly selected from two normal populations with equal variances.In order to test the difference between the population means,the test statistic is

• A)a standard normal random variable.
• B)an approximately standard normal random variable.
• C)t-distributed with 45 degrees of freedom.
• D)t-distributed with 43 degrees of freedom.

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Definitions:

Mercantilism

An economic theory and practice dominant in Europe from the 16th to the 18th century, focusing on building a nation's wealth by exporting more than it imports and accumulating precious metals.

British Parliament

The supreme legislative body in the United Kingdom, consisting of two houses: the House of Commons and the House of Lords.

Economic Relationship

The connections between economic entities or principles, including the ways in which they interact and influence each other.

Salem Village

Historical community located in Massachusetts known for the Salem Witch Trials of 1692, where accusations of witchcraft led to trials and executions.