Question $3$

$20$ points

Given the data in the table below, one wants to classify the records' return to be up or down based on other attributes. If the attribute "Past Trend"

is used for split $-$ there are two nodes from this split: "Positive" and "Negative", what is the gini index of the node "Positive"?

a$.1$

b$.0\mathrm{.}44$

c$.0\mathrm{.}5$

d$.0\mathrm{.}34$Decision tree Entropy would be applied to classify the data in the table below as positive and negative. Calculate the I. ribute