Use Computer Software to Obtain the Regression Equation A) 415
B) 252
C) 405
D) 293

question 77

Multiple Choice

Use computer software to obtain the 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. $\begin{array}{cccc}\hline\text { WEIGHT } & \text { CHEST } & \text { LENGTH } & \text { SEX } \\\hline 344 & 45.0 & 67.5 & 1 \\416 & 54.0 & 72.0 & 1 \\220 & 41.0 & 70.0 & 2 \\360 & 49.0 & 68.5 & 1 \\332 & 44.0 & 73.0 & 1 \\140 & 32.0 & 63.0 & 2 \\436 & 48.0 & 72.0 & 1 \\132 & 33.0 & 61.0 & 2 \\356 & 48.0 & 64.0 & 2 \\150 & 35.0 & 59.0 & 1 \\202 & 40.0 & 63.0 & 2 \\365 & 50.0 & 70.5 & 1\\\hline\end{array}$

• A) 415
• B) 252
• C) 405
• D) 293

---

Definitions:

Mass Spectrometer

A device that measures the masses within a sample by ionizing chemical compounds to generate charged particles and then analyzing them.

Atomic Masses

The mass of an atom expressed in atomic mass units, representing the total mass of protons, neutrons, and electrons in the atom.

Magnetic Field

A region around a magnetic material or a moving electric charge within which the force of magnetism acts.

Dalton's Law

The principle that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the individual gases.