In Order to Reduce the Number of Joins That Must

question 61

Multiple Choice

In order to reduce the number of joins that must be performed in a query and to increase the speed of data access, the data analyst will _____ the physical model.

• A) cluster
• B) denormalize
• C) index
• D) normalize
• E) optimize

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Definitions:

Sampling Distribution

Likelihood patterns of a specific statistic that are based on randomly chosen samples.

Normally Distributed

Describes a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Approximately Normally Distributed

Refers to a data set or population that closely follows a normal distribution, characterized by a bell-shaped curve.

Z-score

A statistical measure that describes a value's relationship to the mean of a group of values, measured in terms of standard deviations from the mean.