The following data are annual disposable income and total annual consumption for 22 families selected at random from a large metropolitan area.Use 1 decimal place for your final answer.

Calculate the error when Income = 56 (or the 20th observation in figure 4)

Figure 4 Output Statistics

Obs 20 Dependent variable = 34.8, Predicted Value = Black, Std Mean Predict = 3.1378, )5% CL Mean = Black, 95% CL Predict = 25.5990 & 64.3573, Residual = Black