A Unique Number Called A(n)____ Identifies Each Item in a Collection

question 16

Multiple Choice

A unique number called a(n) ____ identifies each item in a collection.

• A)counter
• B)index
• C)accumulator
• D)tracker

---

Definitions:

Wilcoxon Rank Sum Test

A non-parametric statistical test used to compare two independent samples to determine if they come from the same distribution.

Null Hypothesis

A default hypothesis that there is no significant difference or effect, often represented as H0 in statistical tests, to be tested against an alternative hypothesis.

Wilcoxon Test

A non-parametric statistical test used to compare two paired groups and determine whether their population mean ranks differ.

Expected Value

A measure in probability and statistics indicating the average outcome of a random event, calculated as the weighted average of all possible values.