Find an Equation for the Graph $y = \frac { 1 } { 2 } \cos \left( \frac { 1 } { 2 } x \right)$

question 17

Multiple Choice

Find an equation for the graph.
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• A) \(y = \frac { 1 } { 2 } \cos \left( \frac { 1 } { 2 } x \right)\)
• B) \(y = \frac { 1 } { 2 } \cos \left( \frac { 1 } { 4 } x \right)\)
• C) \(y = \cos ( 4 x )\)
• D) \(y = \frac { 1 } { 2 } \cos ( 4 x )\)

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Definitions:

F-test

An F-test is a statistical test used to compare the variances of two populations and is based on the F-distribution.

Two Tail T-test

A statistical hypothesis test used to determine if there is a significant difference between the means of two groups, allowing for differences in both directions.

Population Means

The average value of a characteristic within a total population, providing a central tendency measure of the data set.

Populations

In statistics, a population refers to the complete set of items or individuals from which data can be collected.