The Z-Test for Zero Difference in Two Means

question 24

Multiple Choice

The z-test for zero difference in two means:

• A)is generally the preferred test for means.
• B)is rarely suitable for business data.
• C)is the most powerful test for means.
• D)is not available in Excel's Data Analysis.

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Definitions:

Variance

A measure of variability that describes the spread of a data set or distribution.

Standard Deviation

A measure of the dispersion or variability within a dataset, indicating how spread out the values are from the mean.

Coefficient Of Variation

A consistent way to quantify the variability of a probability or frequency distribution, represented as a proportion of the mean.

Range

The gap between the maximum and minimum numbers within a dataset.