The Two Samples Whose Statistics Are Given in the Table $\begin{array}{|c|c|c|}\hline \boldsymbol{n} & \text {Mean} & \text {SD} \\\hline 12 & 45 & 6 \\\hline 16 & 41 & 8 \\\hline\end{array}$

question 46

Multiple Choice

The two samples whose statistics are given in the table are thought to come from populations with equal variances. What is the pooled estimate of the population standard deviation?

$\begin{array}{|c|c|c|}\hline \boldsymbol{n} & \text {Mean} & \text {SD} \\\hline 12 & 45 & 6 \\\hline 16 & 41 & 8 \\\hline\end{array}$

• A) 10
• B) 7.22
• C) 7.14
• D) 2.65
• E) 7

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Definitions:

Lack

A state or condition of not having something or not having enough of something.

Sternocleidomastoid

A muscle in the side of the neck that acts to flex and rotate the head.

Clavicle

A long bone that serves as a strut between the shoulder blade and the sternum or breastbone; also known as the collarbone.

Contractility

The capability or property of muscle tissue to contract or shorten, producing movement or tension.