Exhibit 13-6
Below You Are Given a Partial Computer Output

question 76

Multiple Choice

Exhibit 13-6
Below you are given a partial computer output based on a sample of 16 observations.
$\begin{array}{lcc} & \text { Coefficient } & \text { Standard Error } \\\text { Intercept } & 12.924&4.425\\\mathrm{X}_{1} & -3.682&2.63. \\\mathrm{X}_{2} &45.216&12.560\\\end{array}$
$\text { Analysis of Variance }$

$\begin{array}{lccc}\text { Source of } & \text { Degrees } &\text { Sum of } &\text { Mean }\\\text { Variation } & \text { of Freedom }&\text { Squares } & \text { Square }&F\\\text { Regression }&&4,853&2,426.5\\\text {Error }&&&485.3\end{array}$
-Refer to Exhibit 13-6. The test statistic used to determine if there is a relationship among the variables equals

• A) -1.4
• B) 0.2
• C) 0.77
• D) 5

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Definitions:

Motility

The ability of organisms and cells to move spontaneously and actively, consuming energy in the process.

Amoebozoa

A phylum of single-celled organisms characterized by their amoeboid movement and feeding by phagocytosis.

Excavates

A group of unicellular organisms, many of which are flagellates, that includes both free-living and parasitic species.

Ciliates

A group of protozoans characterized by the presence of hair-like structures called cilia used for movement and feeding.