The Mean Age in Months for Preschool Children Was Reported

question 12

Multiple Choice

The mean age in months for preschool children was reported as 25.5. The standard deviation for Group 1 was 3.4 and for Group 2, 4.9. From this, we may conclude that

• A) Group 1 is more variable than Group 2.
• B) the mode for Group 1 is higher than that for Group 2.
• C) Group 2 is more variable than Group 1.
• D) the median age for Group 2 is higher than that for Group 1.

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Definitions:

Deseasonalized Time Series

A time series from which seasonal influences have been removed to better identify real trends, cycles, and irregular variations in the data.

Monthly Seasonal Indexes

Quantitative measures that adjust for seasonal variation in data by month, often used in forecasting and analyzing trends.

Moving Average

A statistical technique used to analyze data points by creating a series of averages of different subsets of the full data set.

Seasonal Variation

Refers to periodic fluctuations in data or variables that are related to seasonal changes.