One Purpose of a Data Manipulation Language Is To

question 59

Multiple Choice

One purpose of a data manipulation language is to:

• A)Create data fields
• B)Define the record structure
• C)Create queries on the data
• D)all of these

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Definitions:

Populations

In statistics, populations refer to the entire group of individuals or items of interest from which a statistical sample is drawn for analysis.

Z-test

A statistical analysis designed to identify variations between the means of two distinct populations, provided that the variances are predetermined and the size of the sample is substantial.

T-test

A statistical test used to compare the means of two groups or to compare a sample mean to a known value when variances are known or assumed to be equal.

Population Variances

Population variances measure the variability or spread of a population's data points from its mean, indicating how much the population data values differ from each other.