Table 8.10 shows cricket chirps per minute and temperature in degrees Fahrenheit for the striped ground cricket [11]. Which is the dependent variable? Draw a scatter diagram with the cricket chirps axis running from 0 to 20, and the temperature axis running from 60 to 100. Does the relationship seem linear? Estimate the equation Y = α + βX + ε by least squares and draw this fitted line in your scatter diagram. In ordinary English, interpret your estimate of the slope.

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Chirps Temperature Chirps Temperature Chirps Temperature 20.0 88.6 15.5 75.2 17.2 82.6 16.0 71.6 14.7 69.7 16.0 80.6 19.8 93.3 15.4 69.4 17.0 83.5 18.4 84.3 16.2 83.3 17.1 82.0 17.1 80.6 15.0 79.6 14.4 76.3