6. Crickets aren't perfect Refer to Exercise 2. The equation of the regression line for predicting y = chirps per minute from x = temperature in degrees Fahrenheit is ? = ?0.31 + 0.212x (a) One observation in these data measured 16.2 chirps per minute at 83.3°F. Calculate the residual for this observation. (b) Interpret the residual for this observation.
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A residual is the difference between an observed value and the value predicted by a regression line. In other words, it's the error in the prediction for a specific data point. The formula for calculating a residual for a given observation is: Residual = Observed Show more…
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Scientists researching crickets have observed that the rate at which a certain species chirps may be related to their surrounding temperature. The table below contains chirping rates of crickets for various temperatures. Temperature (°F) 55 60 65 70 75 80 85 90 Chirping Rate (chirps per minute) 21 46 79 91 123 140 173 198 Find the equation of a linear regression model that is appropriate for this data.
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