Your Textbook Extends the Simple Regression Analysis of Chapters 4 $\widehat{\text { TestScore }}$

question 41

Essay

Your textbook extends the simple regression analysis of Chapters 4 and 5 by adding an additional explanatory variable, the percent of English learners in school districts (PctEl). The results are as follows: $\widehat{\text { TestScore }}$ = 698.9 - 2.28 × STR
and $\widehat{\text { TestScore} }$ = 698.0 - 1.10 × STR - 0.65 × PctEL
Explain why you think the coefficient on the student-teacher ratio has changed so dramatically (been more than halved).

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Definitions:

Diabetes

A chronic condition characterized by high blood sugar levels resulting from the body's inability to produce or effectively use insulin.

Cognitive Function

Mental processes that involve the ability to learn, remember, reason, solve problems, make decisions, and pay attention.

Moderate to Vigorous

Describes physical activities that range from moderate intensity, where you can talk but not sing, to vigorous intensity, where talking becomes difficult.

Aerobic Physical Activity

Exercise that improves heart and lung function by increasing the oxygen consumption throughout the body over extended periods.