In Chapter 15, we were concerned with predicting the number of ice cream bars we could expect to sell at the beach from the daily highest temperature. Our goal was to predict that number as accurately as possible so that we would neither take too much ice cream to the beach or too little. Because of the linear shape depicted in the scatterplot and the strong relationship between number of ice cream sales and daily highest temperature (r = 0.887), we were able to construct a reasonably accurate simple linear regression equation for prediction with R2 = 0.78. But, we can try to do even better.
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