Exhibit 13-12
in a Laboratory Experiment, Data Were Gathered on the Life

question 127

Multiple Choice

Exhibit 13-12
In a laboratory experiment, data were gathered on the life span Y in months) of 33 rats, units of daily protein intake X1) , and whether or not agent X2 a proposed life extending agent) was added to the rats diet X2 = 0 if agent X2 was not added, and X2 = 1 if agent was added.) From the results of the experiment, the following regression model was developed.
$\hat { Y }$ =36+0.8X1 - 1.7X2
Also provided are SSR = 60 and SST = 180.
-Refer to Exhibit 13-12. The degrees of freedom associated with SSE are

• A) 3
• B) 33
• C) 32
• D) 30

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Definitions:

Plants And Animals

Distinct groups of living organisms; plants are primarily photosynthetic eukaryotes, while animals are multicellular eukaryotes with varied dietary habits.

Latitude

A measurement of distance in degrees north or south of the Earth's equator.

Temperature

a measure of the warmth or coldness of an object or substance with reference to some standard value.

Equator

An imaginary line around the middle of Earth, equidistant from the North and South Poles, dividing the Earth into the Northern and Southern Hemispheres.