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Example 5 from Algebra and Trigonometry, 4.3 Fitting Linear Models to Data
Calculate the correlation coefficient for cricket-chirp data in Table 1.
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Because the data appear to follow a linear pattern, we can use technology to calculate Enter the inputs and corresponding outputs and select the Linear Regression. The calculator will also provide you with the correlation coefficient, This value is very close to 1, which suggests a strong increasing linear relationship.
Note: For some calculators, the Diagnostics must be turned "on" in order to get the correlation coefficient when linear regression is performed: [2nd]>[0]>[alpha][x–1], then scroll to DIAGNOSTICSON.
How did it go?