A Random Group of Students Was Asked to Name Their $20 \%$

question 48

Multiple Choice

A random group of students was asked to name their favourite type of music. The campus radio station believes that $20 \%$ of the students prefer rap, $22 \%$ prefer rock, $21 \%$ prefer country, $11 \%$ prefer new age, and $26 \%$ prefer oldies. Is there evidence to reject this hypothesis at $= .05$ ?
$\begin{array} { c c c c c c } \begin{array} { c } \text { Type of } \\ \text { music } \end{array} & \text { Rap } & \text { Rock } & \text { Country } & \text { New Age } & \text { Oldies } \\ \begin{array} { c } \text { Number of } \\ \text { Students } \end{array} & 19 & 32 & 16 & 18 & 18 \end{array}$

• A)There is not evidence to reject the claim that the favourite music types are distributed as claimed . because the test value \(9.488 < 12.245\)
• B)There is evidence to reject the claim that the favourite music types are distributed as claimed because the test value \(12.245 > 7.815\)
• C)There is not evidence to reject the claim that the favourite music types are distributed as claimed because the test value \(11.07 < 12.245\)
• D)There is evidence to reject the claim that the favourite music types are distributed as claimed because . the test value \(12.245 > 9.488\)

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Definitions:

Delta Waves

Slow brain waves that are present in deep sleep and represent the deepest stage of dreamless sleep.

Stage 3 Sleep

A deep phase of sleep characterized by slow brain waves, known as delta waves, essential for restorative sleep.

EEG Machine

An EEG Machine (Electroencephalogram Machine) is a medical device used to measure and record the electrical activity of the brain, useful in diagnosing conditions like epilepsy.

REM Sleep

A sleep phase marked by Rapid Eye Movement, where dreaming and increased brain activity occur.