Hypothesis testing helps us to validate the various claims made by different people in different scenario. For example if we claim that there is no significant difference between boys and girls intelligence level. So can we validate it significantly? Or can we validate that smoking causes cancer?

# Author: Ashutosh Tripathi

## A Complete Guide to Decision Tree Formation and Interpretation in Machine Learning

Decision Tree is supervised machine learning algorithm which is used for both types of problems regression (that is predicting the continuous value for future example house price, hours the match can be played given overcast condition etc…) and classification (that is classifying different objects into respective categories or classes for example given the overcast conditions match will be played or not, given image belongs to cat or dog etc…).

## What is the difference between Precision-Recall Curve vs ROC-AUC curve?

In Machine Learning, it is very important to have good understanding of different performance metrics. And it is even more important to know when to use which one to correctly explain the model performance. In classification problems more specific to binary classification, you can not conclude your model without plotting Precision-Recall curve and ROC-AUC curve. In this post, will learn what is the main difference between Precision-Recall curve and ROC-AUC curve and when to use which one.

## Decision Tree for Regression Models in Machine Learning

The ID3 algorithm can be used to construct a decision tree for regression type problems by replacing Information Gain with Standard Deviation Reduction – SDR

A decision tree is built top down from a root node and involves partitioning the data into subsets that contain instances with similar values mean homogeneous data.

Here, standard deviation is used to calculate the homogeneity of a numerical sample (target variable).

## Frequently Asked Machine Learning Interview Questions from Linear Regression

What is Covariance coefficient?

Covariance tells you whether two random variables vary with respect to each other or not. And if they vary together then whether they vary in same direction or in opposite direction with respect to each other. So if both random variables vary in same direction then we say it is positive covariance, however if they vary in opposite direction then it is negative covariance.

## MLOps: A Complete Guide to Machine Learning Operations | MLOps vs DevOps

MLOps is the union of DevOps, machine learning, and data engineering. Built on DevOps’ existing approach, MLOps solutions are developed to increase re-usability, facilitate automation, manage data drift, model versioning, experiment tracking, continuous training and extract richer and consistent insights in a machine learning project.