Robin Wanted to Know If the Age Partition Chosen for Her

Multiple Choice

Robin wanted to know if the age partition chosen for her data was the best fit for her 30 case, 90% Class 1, 10% Class 0 partition. She completed the Gini impurity index with the results of (Age < 32) = 0.2034 and (Age $\ge$ 32) = 0.2786. What is the weighted combination and what did partition at Age 32 produce?

A) Robin was able to reduce the Gini index from 0.2786 to 0.2507, confirming the best split for age.
B) Robin was able to reduce the Gini index from 0.2786 to 0.20, confirming the best split for age.
C) Robin was able to reduce the Gini index from 0.2786 to 0.2109, confirming the best split for age.
D) Robin realized with the 0.2507 weighted average, the age split was not the best split for the age range.