Consider the following class-labeled training tuples from the Electronics customer database. RID age 1 2 3 no 4 yes income student credit_rating Class: buys.computer youth high no fair no youth high excellent no middle aged high no fair yes senior medium no fair senior low yes fair yes senior low yes excellent no middle aged low excellent yes youth medium no fair no youth low yes fair yes senior medium yes fair youth medium yes excellent middle aged medium excellent middle aged high yes fair yes senior medium no excellent no 5 6 7 8 9 10 11 12 13 14 yes yes yes yes no What is Gini index for the attribute name income for the subsets {low, high) and {medium}? (Hint: calculate Gini(income) if income subsets {medium}) Select one: O a. 0.315 ob. 0.300 OC. 0.375 d. Not listed Consider a transactional database where 1, 2, 3, 4, 5, 6, 7 are items. ID Items t1 | 1, 2, 3, 5 t2 1, 2, 3, 4, 5 t3 1, 2, 3, 7 t4 1, 3, 6 1, 2, 4, 5, 6 t 5 Apply Apriori algorithm on the given database and suppose the minimum support is 60%. What are resulting frequent itemsets in L2 ? Select one: Itemset {1,21 {1,3 Support 4 4 Itemset {1,2) {1,3) {1,5) {2,3) (2.53 Support 4 4 3 3 3 b. Support 4 4 3 Itemset {1,2) 11.3) 1,5 (2,3) Itemset {1,21 {1.3) {1,5} Support 4 4 3 d. Consider a transactional database where 1, 2, 3, 4, 5, 6, 7 are items. ID Items t1 | 1, 2, 3, 5 t2 1, 2, 3, 4, 5 t3 1, 2, 3, 7 t4 1, 3, 6 1, 2, 4, 5, 6 t 5 Apply Apriori algorithm on the given database and suppose the minimum support is 60%. What are resulting frequent itemsets in L2 ? Select one: Itemset {1,21 {1,3 Support 4 4 Itemset {1,2) {1,3) {1,5) {2,3) (2.53 Support 4 4 3 3 3 b. Support 4 4 3 Itemset {1,2) 11.3) 1,5 (2,3) Itemset {1,21 {1.3) {1,5} Support 4 4 3 d. Given the following data: T1 13 T2 15 T3 16 T4 16 T5 T6 20 T7 20 T8 21 T9 22 Tuples T10 22 T11 25 T1225 T13 25 T14 25 T15 | 30 T16 33 11733 T1833 19 T19 33 T20 35 T21 35 T22 36 T23 40 T24 45 T25 46 T2652 T27 70 The following sample is taken: T4 16 T6 20 T10 22 T11 25 T26 32 Which type of sampling is used? Select one: a. SRSWOR O b. SRSWR c. Stratified d. Not listed