A ____ Is an Attribute or Combination of Attributes That

question 14

Multiple Choice

A ____ is an attribute or combination of attributes that uniquely identifies a tuple.

• A)secondary key
• B)primary key
• C)foreign key
• D)preferred key

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Definitions:

Type II Error

Occurs when a statistical test fails to reject a false null hypothesis; also known as a false negative.

Level Of Significance

A threshold in hypothesis testing that determines whether or not the null hypothesis can be rejected.

Null Hypothesis

A default premise stating no statistical significance or effect, used as a starting point for hypothesis testing to be either rejected or not rejected.

Z Statistic

A statistical measure that quantifies the distance (in standard deviation units) a data point is from the mean of a data set.