A Primary Key Used in a Database Is a ________

question 58

Multiple Choice

A primary key used in a database is a ________.

• A) group of rows that are formed to identify a unique table or file
• B) column or group of columns that identifies a unique row in a table
• C) character or byte that represents fields or columns
• D) group of tables or files formed to identify a unique field or row

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Definitions:

Obtained Value

The actual value measured or calculated in an experiment, often compared against a critical value to determine statistical significance.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter.

Smaller Range

Smaller range refers to a narrower interval between the smallest and largest values in a data set, indicating less variability among the data points.

Test Statistic

A metric derived from sample information in a hypothesis test, utilized to determine the rejection of the null hypothesis.