Use Computer Software to Obtain the Multiple Regression Equation A) 405 Lb
B) 293 Lb
C) 415 Lb
D)

question 15

Multiple Choice

Use computer software to obtain the multiple regression equation. Use the estimated equation to find the predicted value.
-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. He took his equation "to the forest" and found a male bear whose chest measured 40.3 inches and who was 64.0 inches long. $$\begin{array} { | c c c c | } \hline \hline \text { WEIGHT } & \text { CHEST } & \text { LENGTH } & \text { SEX } \\\hline 344 & 45.0 & 67.5 & 1 \\416 & 54.0 & 72.0 & 1 \\220 & 41.0 & 70.0 & 2 \\360 & 49.0 & 68.5 & 1 \\332 & 44.0 & 73.0 & 1 \\140 & 32.0 & 63.0 & 2 \\436 & 48.0 & 72.0 & 1 \\132 & 33.0 & 61.0 & 2 \\356 & 48.0 & 64.0 & 2 \\150 & 35.0 & 59.0 & 1 \\202 & 40.0 & 63.0 & 2 \\365 & 50.0 & 70.5 & 1 \\\hline\end{array}$$

• A) 405 lb
• B) 293 lb
• C) 415 lb
• D) 252 lb

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Definitions:

T Value

A statistic calculated in a T-test that measures the size of the difference relative to the variation in your sample data.

Homogeneity-of-Variance

The assumption that different samples in a study have the same variance or variability, often checked before applying certain statistical tests.

T Test

A statistical test used to compare the means of two groups and determine if there are statistically significant differences between them.

Pooled Standard Deviation

A method for calculating the overall standard deviation from multiple samples or groups, combining variances to assess overall variability.