Decide Whether the Given Set of Numbers Is a Group

question 119

Multiple Choice

Decide whether the given set of numbers is a group under the given operation.
-Rational numbers; multiplication

• A) Yes
• B) No

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Definitions:

Hypotheses

Statements made for the purpose of testing if they are true or false within the context of scientific research or experiments.

Two-tailed Test

A statistical test hypothesis where the area of interest is in both tails of the probability distribution, testing for the possibility of an effect in two directions.

One-tail Area

The probability in the tail of a distribution in a one-tailed test.

P-value

The chance of witnessing outcomes from a test that are as extreme or more extreme than what was actually seen, given the presupposition that the null hypothesis holds.