What Type of Test for Population Means Should Be Performed

question 93

Multiple Choice

What type of test for population means should be performed when employees are first tested, trained, and then retested?

• A) A z test under independent sampling with known population variances.
• B) A t test under independent sampling with unknown but equal population variances.
• C) A t test under dependent sampling.
• D) A t test under independent sampling with unknown and unequal population variances.

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Definitions:

Total Income

The sum of all earnings obtained from labor, capital investments, and any other source before any taxes or deductions are applied.

Income Distribution

The way in which a nation’s total GDP is distributed amongst its population, affecting the economic well-being of its citizens.

Official Poverty Line

A threshold set by the government defining the minimum level of income sufficient to cover basic living expenses, used to identify individuals or households in poverty.

Federal Government

The national government of a federal state, which holds the authority over matters that affect the entire country, distinct from state or local governments.