All of the Following Are Tasks of Data Cleansing EXCEPT

question 26

Multiple Choice

All of the following are tasks of data cleansing EXCEPT:

• A) decoding data to make them understandable for data warehousing applications.
• B) adding time stamps to distinguish values for the same attribute over time.
• C) generating primary keys for each row of a table.
• D) creating foreign keys.

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Definitions:

Right Tail

The portion of a distribution to the right of a specified value, often related to the significance level in hypothesis testing.

Observed Frequencies

The actual number of occurrences or instances recorded in each category or interval of a study.

Expected Frequencies

The anticipated count of occurrences in each category of a variable, calculated under a specific hypothesis in a chi-square test.

Shape

Describes the geometric or visual characteristics of an object or distribution, such as symmetry, skewness, or roundness.