# Category Archives: Data Science

## QA & Data Science – How to Test Features Relevance

In this post, I intend to present a perspective on the need for QA / testing team to test the feature relevance when testing the machine learning models as part of data science QA initiatives, and, different techniques which could be used to test or perform QA on feature relevance. Feature relevance can also be termed as feature importance. Simply speaking, a feature is said to be relevant or important if it adds real predictive value to the underlying model. The relevant features must display a stable statistical relationship or association with the outcome variable. Well, an association does not imply a causation. However, a relevant feature or a feature …

## Quality Assurance / Testing the Machine Learning Model

This is the first post in the series of posts related to Quality Assurance & Testing Practices and Data Science / Machine Learning Models which I would release in next few months. The goal of this and upcoming posts would be to create a tool and framework which could help you design your testing/QA practices around data science/machine learning models. Why QA Practices for testing Machine Learning Models? Are you a test engineer and want to know about how you could make difference in AI initiative being undertaken by your current company? Are you a QA manager and looking for or researching tools and frameworks which could help your team perform QA with …

## AI – Three Different types of Machine Learning Algorithms

This post is aimed to help you learn different types of machine learning algorithms which forms the key to artificial intelligence (AI). Machine learning algorithms Representation or Feature learning algorithms Deep learning algorithms The following represents different types of learning algorithms in form of a Venn diagram. What are Machine Learning (ML) Algorithms? Machine learning algorithms are the most simplistic class of algorithms when talking about AI. ML algorithms are based on the idea that external entities such as business analysts and data scientists need to work together to identify the features set for building the model. The ML algorithms are, then, trained to come up with coefficients for each of the features and how are they …

## 8 Machine Learning Javascript Frameworks to Explore

Javascript developers tend to look out for Javascript frameworks which can be used to train machine learning models based on different machine learning algorithms. The following are some of the machine learning algorithms using which models can be trained using different javascript frameworks listed in this article: Simple linear regression Multi-variate linrear regression Logistic regression Naive-bayesian K-nearest neighbour (KNN) K-means Support vector machine (SVM) Random forest Decision tree Feedforward neural network Deep learning network In this post, you will learn about different Javascsript framework for machine learning. They are some of the following: Deeplearn.js Propel ConvNetJS ML-JS KerasJS STDLib Limdu.js Brain.js DeepLearn.js Deeplearn.js is an open-source machine learning Javascript library …

## Data Science – What are Machine Learning (ML) Models?

Machine learning (ML) models is the most commonly used in a data science project. In this post, you will learn about different definitions of a machine learning model to get a better understanding of what are machine learning models? A model is the relationship between features and the label. (Tensorflow – Getting Started for ML Beginners) An ML model is a mathematical model that generates predictions by finding patterns in your data. (AWS ML Models) ML Models generate predictions using the patterns extracted from the input data (Amazon Machine learning – Key concepts) Learning in the supervised model entails creating a function that can be trained by using a training …

## 10+ Key Stages of Data Science Project Life cycle

Data science projects need to go through different project lifecycle stages in order to become successful. In each of the stages, different stakeholders get involved as like in a traditional software development lifecycle. In this post, you will learn some of the key stages/milestones of data science project lifecycle. This article is aimed to help some of the following project stakeholders who play key roles in data science project implementation: Product managers Project managers ML architects The following represents 6 high-level stages of data science project lifecycle: Planning Model development & testing Product-level changes Model deployment Monitoring the model Model Enhancement Data Science Project Lifecycle – Planning ML Problem identification: …

## Tutorials – Building Machine Learning Models for Predicting Cancer

In this article, I would introduce different aspects of the building machine learning models to predict whether a person is suffering from malignant or benign cancer while emphasizing on how machine learning can be used (predictive analysis) to predict cancer disease, say, Mesothelioma Cancer. The approach such as below can as well be applied to any other diseases including different types of cancers. Predicting Mesothelioma Cancer – Supervised Learning Problem Machine learning problems are classified into different kinds of learning problem. Most important of them are following: Supervised learning Unsupervised learning Supervised Learning In supervised learning, you have a history of data with each record being labeled. Thus, in case of predictive analysis of Mesothelioma cancer, there is …

## Top 8 Neural Networks and Deep Learning Tutorials

Here is a list of top 8 neural networks tutorials (web pages) for getting started on neural networks and deep learning. Introduction to Deep Neural Networks Neural Networks and Deep Learning: Free online book to learn concepts related with neural networks and deep learning. Very good for beginners. Concepts explained using Handwritten digits. The book is authored by Michael Nielsen. Neural Networks: The page explains and demonstrates various types of neural networks along with applications of neural networks like ANNs in medicine. Coursera Course on Neural Networks for Machine Learning: This can be used to learn fundamentals related with artificial neural networks and how they’re being used for machine learning, …

## 70 Regression Analysis Interview Questions & Practice Tests

This page lists down practice tests (questions and answers), links to PDF files (consisting of interview questions) on Linear / Logistic Regression for machine learning / data scientist enthusiasts. These questions can prove to be useful, especially for machine learning / data science interns / freshers / beginners to check their knowledge from time-to-time or for upcoming interviews. Practice Tests on Linear / Multilinear Regression These are a set of four practice tests (consisting of 40 questions) covering linear (univariate) and multilinear (multivariate) regression in detail. Linear, Multiple regression interview questions and answers – Set 1 Linear, Multiple regression interview questions and answers – Set 2 Linear, Multiple regression interview …

## Logistic Regression Interview Questions & Practice Tests

This page lists down a set of 30 interview questions on Logistic Regression (machine learning/data science) in form of objective questions and also provides links to a set of three practice tests that would help you test / check your knowledge on an ongoing basis. These questions and practice tests are intended to primarily help interns/freshers/beginners to help them brush up their knowledge in logistic regression from time to time. The following is a list of topics covered on this page. Introduction to logistic regression Logistic regression examples Evaluating performance of logistic regression and related techniques including AIC, deviance, ROC etc. Difference between linear and logistic regression Here is another post on …

## Tutorials – Top 6 Linear Regression Tutorials for 2017

This page lists down top 6 machine learning tutorials (from Youtube) for the topic, Linear (Univariate) and Multilinear (Multivariate) regression from the perspective of most viewed / popularity. Following are the topics for these videos: How to Do Linear Regression using Gradient Descent Interpreting Output for Multiple Regression using SPSS R programming for beginners – statistic with R Linear Regression with Gradient Descent – Intelligence and Learning Linear Regression – Machine Learning Fun and Easy Linear Regression Algorithm | Linear Regression in R How to Do Linear Regression using Gradient Descent This tutorial video is posted on the channel Siraj Raval. They have got some real cool tutorial videos on …

## Linear, Multiple Regression Interview Questions Set 4

This page lists down the practice tests / interview questions for Linear (Univariate / Simple Linear) / Multiple (Multilinear / Multivariate) regression in machine learning. Those wanting to test their machine learning knowledge in relation with linear/multi-linear regression would find the test useful enough. The goal for these practice tests is to help you check your knowledge in numeric regression machine learning models from time-to-time. More importantly, when you are preparing for interviews, these practice tests are intended to be handy enough. Those going for freshers / intern interviews in the area of machine learning would also find these practice tests / interview questions to be very helpful. This test primarily …

## Linear, Multiple Regression Interview Questions Set 3

This page lists down the practice tests / interview questions for Linear (Univariate / Simple Linear) / Multiple (Multilinear / Multivariate) regression in machine learning. Those wanting to test their machine learning knowledge in relation with linear/multi-linear regression would find the test useful enough. The goal for these practice tests is to help you check your knowledge in numeric regression machine learning models from time-to-time. More importantly, when you are preparing for interviews, these practice tests are intended to be handy enough. Those going for freshers / intern interviews in the area of machine learning would also find these practice tests / interview questions to be very helpful. This test primarily …

## Linear, Multiple Regression Interview Questions Set 2

This page lists down the practice tests / interview questions and answers for Linear (Univariate / Simple Linear) / Multiple (Multilinear / Multivariate) regression in machine learning. Those wanting to test their machine learning knowledge in relation with linear/multi-linear regression would find the test useful enough. The goal for these practice tests is to help you check your knowledge in numeric regression machine learning models from time-to-time. More importantly, when you are preparing for interviews, these practice tests are intended to be handy enough. Those going for freshers / intern interviews in the area of machine learning would also find these practice tests / interview questions to be very helpful. This …

## Linear, Multiple Regression Interview Questions Set 1

This page lists down the practice tests / interview questions and answers for Linear (Univariate / Simple Linear) / Multiple (Multilinear / Multivariate) regression in machine learning. Those wanting to test their machine learning knowledge in relation with linear/multi-linear regression would find the test useful enough. The goal for these practice tests is to help you check your knowledge in numeric regression machine learning models from time-to-time. More importantly, when you are preparing for interviews, these practice tests are intended to be handy enough. Those going for freshers / intern interviews in the area of machine learning would also find these practice tests / interview questions to be very helpful. Note that …

## Uber Machine Learning Interview Questions

This page represents some of the following in relation with Uber Data Science / Machine Learning interview questions: Interview questions Data Science challenge Machine learning problems These questions / problems etc have been gathered from different websites and blogs including Glassdoor, Github, Blogs etc. Data Science / Machine Learning Interview Questions Uber’s surge pricing algorithm including optimization techniques which can be used. Here is a great write up on The secrets of Uber’s mysterious surge pricing algorithm, revealed How would you find / investigate an anomaly in a distribution? What are different Time Series forecasting techniques? Explain Principle Component Analysis (PCA) with equations? How would you go about solving Multicollinearity? …

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