We could (1) be estimating the expected sales for a city with 22 inches of rainfall, or we could (2) be predicting the actual sales for a city with 22 inches of rainfall. The green dot represents the ...We could (1) be estimating the expected sales for a city with 22 inches of rainfall, or we could (2) be predicting the actual sales for a city with 22 inches of rainfall. The green dot represents the correct population expected value of \(Y_{22}\), while the yellow dot represents a possible value for the actual predicted value of \(Y_{22}\). The prediction interval for the actual value of \(Y\) for a given value of \(X\) is given by:
