A Data Warehouse Database Differs from an Operational Database Because

question 55

Multiple Choice

A data warehouse database differs from an operational database because ________.

• A) data warehouse data are not stored in tables
• B) data warehouse databases do not have metadata
• C) data warehouse data are often stored in a dimensional database
• D) Both B and C
• E) None of the above

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Definitions:

Simple Random Sampling

A sampling method where every member of a population has an equal chance of being selected.

Probability Sampling

A sampling method in which every member of the population has a known, non-zero chance of being selected, leading to representative and unbiased samples.

Quota Sampling

A sampling method where the sample is chosen to reflect the characteristics of the whole population in certain proportions.

Percentage Points

Percentage points represent the absolute difference between percentages, clarifying changes in percentage rates rather than relative changes.