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:

Activators

Molecules or compounds that increase the activity of enzymes or other proteins, often playing crucial roles in metabolic pathways.

Transcription

The process of copying a segment of DNA into RNA by the enzyme RNA polymerase, serving as a key step in gene expression.

Operators

Symbols or functions that denote operations between variables or values in mathematical or programming contexts.

Archaea

A category of unicellular microorganisms that are genetically different from bacteria and eukaryotes, typically thriving in harsh conditions.