A ________ Key Is Used When Two Fields Are Needed

question 34

Multiple Choice

A ________ key is used when two fields are needed to uniquely identify a record.

• A) composite
• B) natural
• C) foreign
• D) primary

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Definitions:

Wilcoxon Signed Rank

A non-parametric statistical test used to compare two related samples, matched samples, or repeated measurements on a single sample to assess differences in their median values.

Sign Test

A non-parametric test used to evaluate the difference in medians from a pair of related samples, assuming nothing about the distribution of the differences.

Wilcoxon Signed Rank

A statistical test that doesn't rely on parameter assumptions, designed for comparing two related samples, matched pairs, or repeated measures on a single sample to determine if there's a difference in their mean ranks across populations.

Matched Pairs

A study design where subjects are paired based on certain criteria to compare two treatments or conditions, with each subject in the pair receiving a different treatment.