2 [Classification-decision tree] 2- Consider two possible splits of training records during the decision tree induction. 100. B Consider two possible splits of training records during the decision tree induction. a) What is the gini index of each split? Which split produces more pure nodes? b) What is the information gain of each split?

2 [Classification-decision tree] 2- Consider two possible splits of training records during the decision tree induction. 100. B Consider two possible splits of training records during the decision tree induction. a) What is the gini index of each split? Which split produces more pure nodes? b) What is the information gain of each split?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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8. Construct a Binary Search tree (BST) from the following data: 150, 200, 100, 50, 180, 130, 250, 75, 160, 275, 120, 190, 170, 165. and answer the following: (i). What is the level of the node containing 250? (ii). What is the height of the BST? (iii). What will be the resultant BST, if the root node (150) is deleted from the BST?
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Q1 PLEASE QUESTION 1:(a) Draw a binary search tree (BST) after the insertion of keys: 8, 3, 2, 1, 4, and 9, in this order.(b) List the node keys of the above BST in pre-order, in-order, and post-order, respectively.
Apply α-β pruning to the following two-player game tree. (a) how many evaluations, i.e. visiting terminal nodes, are saved due to α-β pruning over MiniMax? (b) what version of this tree do further improvements offer concerning the number of evaluations?
4. Entropy in Decision Trees. entropy for each case below in a two class problem where the node has ni members of class 1 and n2 members of class 2: a) Ifni=n2, then the entropy is b) If n1 = 0 and nz> 0, then the entropy is c) What is the general equation for the entropy of this node in terms of ni and nz? What is the
Question 1: input orders: 8,1,9,4,2,3,5,6,7 please solve this in detail. and answer all the ques Please give Hand written solution.No coding please. Build a Binary Search Tree with the given input order. You must show step by step process of inserting the inputs including both recursive calls and tree diagrams for each step. [ refer to the Insertitem function of Lecture 10 slides to get an idea of doing this.] N.B: Unique Input orders for each student to build the tree are given on a separate file. Write down the input order on your answer script before answering the question. You must use the assigned input order. Do not change the order.
Please show steps clearly
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Please assist with the following question. Your assistance is truly appreciated.
Question 4 a) What problem might occur if you try to apply generic alpha-beta pruning on a game tree of poker or ludo. Give brief details. b) In alpha beta pruning if alpha is set to -inf and beta is set to inf. Will it still work? Why or why not?
a) What problem might occur if you try to apply generic alpha-beta pruning on a game tree of poker or ludo. Give brief details.