In the CricketChirpdataset given in Table 2.31 on page 108, welearn that the chirp rate of crickets is related to the temperature of the air.

Table 2.31

(a) Figure 2.73 shows the seven points together with the regression line. Does there appear to be a linear relationship between these two variables? How strong is it? Is it positive or negative?

Figure 2.73

(b) Use technology to find the formula for the regression line for the seven data points.
(c) Calculate the predicted values and the residuals for all seven data points.

Transcribed Image Text:

Temperature (° F) Chirps (per minute) 54.5 78.5 72.0 59.5 67.5 83.0 63.5 81 97 103 195 123 150 182 83 79 - 75 71 67 63 59 55 80 95 110 125 140 155 170 185 200 Chirps Per Minute Temperature