When Testing the Difference Between Two Population Means, the Variances

question 128

Multiple Choice

When testing the difference between two population means, the variances are pooled when

• A) the population standard deviations are known and equal.
• B) the population means are known.
• C) the population standard deviations are assumed unequal and unknown.
• D) the population standard deviations are assumed equal but unknown.

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Definitions:

PivotTable

A data summarization tool found in data visualization programs like Excel, which allows users to reorganize and summarize selected columns and rows of data.

Data Field

A basic unit of data storage that holds a single piece of information within a record or table in a database or software application.

Slicer Style

A feature in spreadsheet and data visualization software that applies aesthetic design to slicers, enhancing the interactive filter's visual appeal.

Slicer Caption

The label or title given to a slicer in data management tools, which allows users to filter dashboard data or pivot table views based on specific criteria.