There are two data classes + and -. The training set is shown in Table 4.2 as follows.

Please compute the entropy of 1. (hint: compute the entropy of the case 1=, and the entropy of the case 1=; then, the entropy of 1 is the weighted average entropy of the two cases)

Table 4.2. Data set for Exercise 3. Instance ai 02 03 Target Class TT 1.0 TT 6.0 TF 5.0 | F F 4.0 FT 7.0 FT 3.0 F F 8.0 F 7.0 FT 5.0 OCT CON + + I + + 1 0 Table 4.2. Data set for Exercise 3. Instance ai 02 03 Target Class TT 1.0 TT 6.0 TF 5.0 | F F 4.0 FT 7.0 FT 3.0 F F 8.0 F 7.0 FT 5.0 OCT CON + + I + + 1 0