In an Ungrouped Frequency Distribution of the Average Age of High

question 68

Multiple Choice

In an ungrouped frequency distribution of the average age of high school graduates, what would be the boundaries for the class of graduates who were reported to be 18 years old?

• A) 17.5-18.5 years old
• B) 17.6-19.5 years old
• C) 17.6-18.5 years old
• D) 17-19 years old

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Definitions:

Pooled Variance

combines the variances of two or more groups, assuming they have the same underlying variance, to estimate a common variance.

Common Variance

The variance shared by two or more variables, often used in the analysis of variance.

Weighted Average

An average that accounts for the different weights or importance of certain factors or quantities in the dataset.

Sample Variances

Sample variances measure the dispersion or spread of data points in a sample around their sample mean, indicating the degree of variation within the sample.