Math Problem Statement

Alfonso surveyed several students in his school. He asked them to give the grade that they are in and the number of pets they have at home. The results are shown in the table below.

Find the correlation coefficient for the data. Round to the nearest hundredth.

Solution

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Math Problem Analysis

Mathematical Concepts

Statistics
Correlation
Linear Relationships

Formulas

Correlation coefficient formula: r = (nΣxy - ΣxΣy) / √[(nΣx² - (Σx)²)(nΣy² - (Σy)²)]

Theorems

Correlation Coefficient Interpretation
Properties of Linear Correlation

Suitable Grade Level

Grades 9-12