The Following Is a Scatterplot of the Average Final Exam

question 70

Essay

The following is a scatterplot of the average final exam score versus midterm score for 11 sections of an introductory statistics class:


The correlation coefficient for these data is r = 0.829. If you had a scatterplot of the final exam score versus midterm score for all individual students in this introductory statistics course, would the correlation coefficient be weaker, stronger, or about the same? Explain.

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Definitions:

Sea Turtles

Marine reptiles belonging to the order Testudines, characterized by a bony or cartilaginous shell and spending most of their lives in the ocean, with some species endangered due to human activities.

Pollution

The introduction of contaminants into the natural environment causing adverse change.

Mass Transit

Public transportation systems that move large numbers of people efficiently across cities and surrounding areas.

Natural Increase

The growth in population size as a result of more births than deaths, excluding migration.