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SAMAGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM STD 9 TO 12 Every Day Video

SAMAGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM STD 9 TO 12 Every Day Video

The term Classification And Regression Tree (CART) analysis is an umbrella term used to refer to both of the above procedures, first introduced by Breiman et al.

Trees used for regression and trees used for classification have some similarities - but also some differences, such as the procedure used to determine where to split.

A decision tree is drawn upside down with its root at the top. In the image on the left, the bold text in black represents a condition/internal node, based on which the tree splits into branches/ edges. The end of the branch that doesn’t split anymore is the decision/leaf, in this case, whether the passenger died or survived, represented as red and green text respectively.

· Repeat until leaves are “pure”, i.e., have example from a single class, or “nearly pure”, i.e., majority of examples are from the same class

A tree is built by splitting the source set, constituting the root node of the tree, into subsets—which constitute the successor children. The splitting is based on a set of splitting rules based on classification features

This process is repeated on each derived subset in a recursive manner called recursive partitioning. The recursion is completed when the subset at a node has all the same values of the target variable, or when splitting no longer adds value to the predictions. This process of top-down induction of decision trees

Let’s say we have a problem to predict whether a customer will pay his renewal premium with an insurance company (yes/ no). Here we know that income of customer is a significant variable but insurance company does not have income details for all customers. Now, as we know this is an important variable, then we can build a decision tree to predict customer income based on occupation, product and various other variables. In this case, we are predicting values for continuous variable.

what is actually going on in the background? Growing a tree involves deciding on which features to choose and what conditions to use for splitting, along with knowing when to stop. As a tree generally grows arbitrarily, you will need to trim it down for it to look beautiful. Lets start with a common technique used for splitting.

Information gain is used to decide which feature to split on at each step in building the tree. Simplicity is best, so we want to keep our tree small. To do so, at each step we should choose the split that results in the purest daughter nodes. A commonly used measure of purity is called information which is measured in bits. For each node of the tree, the information value "represents the expected amount of information that would be needed to specify whether a new instance should be classified yes or no, given that the example reached that node

SAMAGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM STD 9 TO 12 DATE 19-8 2020

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SAMAGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM STD 9 TO 12 DATE 20-8 2020

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SAMAGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM STD 9 TO 12 DATE 21-8 2020

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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM VIDEO DATE 24-8-2020

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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM VIDEO
DATE 25 -8-2020

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SAMGRA SHIKSHA ABHIYAN VIRTCHUAL CLASS ROOM VIDEO  DATE 27-8-2020

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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM DATE 28-8-2020

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DATE 29-8-2020 VIDEO VIRTCUAL CLASS ROOM WATCH IN BELOW LINK

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SAMGRA SHIKSHA ABHIYAN DD GIRNAR KARYKRAM DATE 30-8-2020

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DATE 31-8-2020 VIRTCHUAL CLASS ROOM
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DATE 1-9-2020

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SAMGRA SHIKSHA ABHIYAN VIRTCHUAL CLASS ROOM VIDEO DATE 2-9-2020

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SARVA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM DATE 3-9-2020
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SAMGRA SHIKSHA VIRTUAL CLASS ROOM VIDEO
DATE 4-9-2020
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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM VIDEO DATE 5-9-2020
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DATE 6-9-2020 VUDEO
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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM VIDEO
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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM DATE 8-9-2020
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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM VIDEO
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SAMGRA SHIKSHA ABHIYAN VIRTUAL CLASS ROOM VIDEO DATE 11-9-2020
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