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Harish Daryani
Harish Daryani

19 Followers

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Mar 12

Base Rate Neglect — A common fallacy

Let’s say there is an outbreak of a certain disease in your town. For simplicity, let’s assume the population of the town is 100 people and occurrence of the disease is 10% i.e. 10 out of the 100 people have the disease. You don’t show any symptoms but still decide…

Base Rate Fallacy

2 min read

Base Rate Neglect — A common fallacy
Base Rate Neglect — A common fallacy
Base Rate Fallacy

2 min read


Nov 13, 2022

How “not to” tell a story from data

What if I told you, data shows people who smoke more cigarettes are less likely to get severe Covid. Sounds counterintuitive, isn’t it? Let’s look at what this data is.

Bias

2 min read

How “not to” tell a story from data
How “not to” tell a story from data
Bias

2 min read


Aug 21, 2022

Moving averages

Oftentimes we find ourselves looking for trends in data presented to us on a daily basis. Common examples are stock prices, website traffic etc. typically referred as time series data. One aspect of such an analysis is to spot the beginning or reversal of a trend. This means being able…

Moving Average

3 min read

Moving averages
Moving averages
Moving Average

3 min read


Mar 18, 2022

“Always” start your bar charts at zero

It’s great to represent data visually with an aim of uncovering insights and communicating effectively from data. We know there are all kinds of data visualizations out there, from a simple line chart to complicated diagrams that represent many dimensions of data in the smallest real estate. One thing every…

Data Visualization

2 min read

“Always” start your bar charts at zero
“Always” start your bar charts at zero
Data Visualization

2 min read


Jan 2, 2022

Polynomial terms in a regression model

Let’s say you have a dataset containing test scores of students and number of hours they studied a day before the test. Here is how the relationship between them looks like.

Linear Regression

3 min read

Polynomial terms in a regression model
Polynomial terms in a regression model
Linear Regression

3 min read


Dec 19, 2021

Interaction effects in machine learning

As an analyst you want to get the most out of your regression model. While you are often limited (or spoilt) by the number of features in your dataset, there are creative ways to power up your model. One of them is to look at interaction effects between features. An…

Machine Learning

3 min read

Interaction effects in machine learning
Interaction effects in machine learning
Machine Learning

3 min read


Nov 21, 2021

What really is an insight ?

More data is being collected now than ever before. So much so, that the lines between data analysis and insight frequently blur. In a growing field like analytics, it is common for misconceptions to set in and terms to be used loosely. Here are my thoughts — Data is not…

Insights

3 min read

What really is an insight ?
What really is an insight ?
Insights

3 min read


Oct 28, 2021

Feature scaling in machine learning

Let’s say you run into a dataset of house prices in your locality with their corresponding area in square feet. You being a data enthusiast want to understand the relationship between area and price. The first thing you probably would do is create a scatter plot. …

Feature Scaling

3 min read

Feature scaling in machine learning
Feature scaling in machine learning
Feature Scaling

3 min read


Sep 11, 2021

From samples to population

More often than not, the data we get for analysis is not about the entire population we wish to study — it’s a sample. Sampling makes sense for the following reasons : It is very expensive to collect data about an entire population. …

Central Limit Theorem

4 min read

From samples to population
From samples to population
Central Limit Theorem

4 min read


Aug 17, 2021

What really is statistical significance ?

The term ‘statistical significance’ often comes up in analyzing results from experiments or observational studies. A common interpretation I have heard in an experimentation context is - Statistical significance tells us if the difference in results between different populations is ‘large’ enough or simply put, whether an experiment had a…

Statistical Significance

3 min read

What really is statistical significance ?
What really is statistical significance ?
Statistical Significance

3 min read

Harish Daryani

Harish Daryani

19 Followers

Lifelong learner

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