Use Computer Software to Find the Regression Equation A) WEIGHT $= - 320 + 10.6$

question 128

Multiple Choice

Use computer software to find the regression equation. Can the equation be used for prediction?
-A wildlife analyst gathered the data in the table to develop an equation to predict the weights of bears. He used WEIGHT as the dependent variable and CHEST, LENGTH, and SEX as the independent variables. For SEX, he used male=1 and female=2. $\begin{array}{cccc}\hline \text { WEIGHT } & \text { CHEST } & \text { LENGTH } & \text { SEX } \\\hline 344 & 45.0 & 67.5 & 1 \\416 & 54.0 & 72.0 & 1 \\220 & 41.0 & 70.0 & 2 \\360 & 49.0 & 68.5 & 1 \\332 & 44.0 & 73.0 & 1 \\140 & 32.0 & 63.0 & 2 \\436 & 48.0 & 72.0 & 1 \\132 & 33.0 & 61.0 & 2 \\356 & 48.0 & 64.0 & 2 \\150 & 35.0 & 59.0 & 1 \\202 & 40.0 & 63.0 & 2 \\365 & 50.0 & 70.5 & 1 \\\hline\end{array}$

• A) WEIGHT \(= - 320 + 10.6\) CHEST + 7.3LENGTH - 10.7SEX; Yes, because the \(\mathrm { P }\)-value is high
• B) WEIGHT \(= - 442.6 + 12.1\) CHEST + 3.6LENGTH \(- 23.8\) SEX; Yes, because the adjusted \(R ^ { 2 }\) is high
• C) WEIGHT \(= 442.6 + 12.1\) CHEST \(+ 4.2\) LENGTH \(- 21 S E X ;\) Yes, because the P-value is low
• D) WEIGHT \(= 196 + 2.35\) CHEST \(+ 3.40\) LENGTH \(+ 25\) SEX; Yes, because the \(\mathrm { R } ^ { 2 }\) is high

Recognize and understand the acronyms related to materials science.

Distinguish between different types of plastics and their behaviors.

Identify the role of heat treatment and catalysts in changing the properties of plastics.

Understand the classification and significance of steel types.

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Definitions:

Social Situation

any scenario in which individuals interact with each other, involving the exchange of information or communication.

Friendly

Characterized by kindness, warmth, and approachability; displaying amicable behavior towards others.

Cognitive Dissonance Theory

A theory suggesting that inconsistency among beliefs, attitudes, and behaviors causes discomfort, leading individuals to adjust them to reduce the discomfort.

Situational Attributions

The process of attributing a person's behavior to external or environmental factors instead of to internal personality traits.