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All Blog Posts Tagged 'statistics' (48)

Cluster sampling: A probability sampling technique

cluster sampling

Image source: Statistical Aid

Cluster sampling is defined as a sampling method where multiple clusters of people are created…

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Added by Muhammad Touhidul Islam on July 13, 2021 at 8:18am — No Comments

A Few Useful Techniques for Business Forecasting

Forecasting is the process of making prediction of the future based on past and present data.

In many cases…

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Added by Muhammad Touhidul Islam on July 9, 2021 at 3:00am — 1 Comment

An Overview of Logistic Regression Analysis

An Intuitive study of Logistic Regression Analysis

Image Source: Statistical Aid
Logistic regression is a statistical technique to find the association between the categorical dependent…
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Added by Muhammad Touhidul Islam on July 6, 2021 at 6:30am — No Comments

An overview of Quadrat Sampling

                                                     Image source:…
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Added by Muhammad Touhidul Islam on June 5, 2021 at 6:00am — No Comments

An Intuitive Study of Time Series Analysis

Components of time series

Image source: Statistical Aid: A School of statistics

Time series data

A time series data is a set of observation on the value that a variable takes of different time, such data may be collected at regular time intervals…

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Added by Muhammad Touhidul Islam on February 9, 2021 at 5:47am — No Comments

Correlation Analysis definition, formula and step by step procedure

Correlation Analysis

The relationship between two or more random variables are generally defined as the correlation. It is the major part of …

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Added by Muhammad Touhidul Islam on February 7, 2021 at 12:30am — No Comments

Can Artificial Intelligence Really be “Explainable”?

I myself do epidemiologic research, which rarely calls for developing machine learning models. Instead, I spend my time developing logistic regression models that I have to be able to interpret for the broader scientific (and sometimes non-scientific) community. I have to be able to explain in some easy, risk-communication way not only the…

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Added by Monika Wahi on December 17, 2020 at 7:47am — No Comments

How do you know what independent variables to include in a regression model?

After a few biostatistics classes, I began fitting my first logistic regression model using my physician friend’s data on tumors excised from skin cancer patients. I realized that although we were very clear about the dependent variable we were trying to predict – a certain feature of the tumor – I really did not know how to pick the independent…

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Added by Monika Wahi on November 14, 2020 at 10:30am — 1 Comment

Odds vs Probability vs Chance

Data Points

  • There are a number of different terms used for probability in statistics.
  • Each has a distinct (and usually precise)…
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Added by Stephanie Glen on October 24, 2020 at 4:30am — No Comments

Simulated Statistics is the New Black

Over the years I’ve often been asked by beginners where they should start in statistics, what they should do first, and which parts of statistics they should prioritise to get them to where they want to be (which is usually a higher…

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Added by Lee Baker on May 26, 2020 at 6:30am — No Comments

A Question of Usability

Thinking of data science as merely a technical profession, like programming, may take you away from your goals. Focusing on the usability of mathematics for data science before jumping into full-fledged math courses will save you a lot of time.

I wrote this blog post because I made a few mistakes while starting…

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Added by Arnuld on December 19, 2019 at 4:00am — No Comments

Statistical Hypothesis Testing – Spinning The Wheel

Knowing when and how to choose the right statistical hypothesis test is no mean feat. It can takes years of learning and practice before you get comfortable with it.

Fortunately, there are ways to shortcut this by having a process, a strategy and a nice, big diagram!

Here I'm going to give you all three!

​Getting…

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Added by Lee Baker on July 23, 2019 at 3:30am — No Comments

A guide to manipulating, analyzing, and visualizing data in R

R has spread deep into the private sector and can be found in the production pipelines at some of the most advanced and successful enterprises. 

Learn the fundamentals of data analysis in the second edition of Data Analysis with R, authored by data scientist…

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Added by Packt Publishing on May 8, 2018 at 10:30pm — No Comments

A “quick” introduction to PyMC3 and Bayesian models

A “quick” introduction to PyMC3 and Bayesian models, Part I

In this post, I give a “brief”, practical introduction using a specific and hopefully relate-able example drawn from real data.…

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Added by Jesus Ramos on May 8, 2018 at 10:00am — No Comments

How I Learned to Stop Worrying and Love Uncertainty

Humans and uncertainty

Since their early days, humans have had an important, often antagonistic relationship with uncertainty; we try to kill it everywhere we find it. Without an explanation for many natural phenomena, humans invented gods to explain them, and without certainty of the future, they consulted oracles.

It was…

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Added by Jesus Ramos on May 8, 2018 at 9:00am — No Comments

Significance of p-value

P – Value

In this blog we will discuss the important functionality of p – value in statistical experiments. Why p – value is the deciding factor for accepting or rejecting a hypothesis we develop before any experiment.

Problem Statement:

You have launched a product (e.g. a phone) in the market. And you get customer feedback that the phone has over heating problem. As the phone is already launched in the market…

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Added by Amlan Kumar Pradhan on March 9, 2018 at 3:30am — 5 Comments

This is Why Data Scientists Make So Much

If you have ever wondered or still wonder what the best job in Silicon Valley is, which ranks No. 1 on Glassdoor’s best jobs in America list for 2016 and 2017, you can stop now. Also referred to as the sexiest job of the 21st century, it’s data science.

Whether you look at the salary and packages currently being offered for this job, or the rise in demand for these professionals, the numbers still look pretty impressive. According to Glassdoor, data scientists make on average $128,549…

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Added by Claudia Virlanuta on February 13, 2018 at 9:30am — No Comments

Hilarious Graphs (and Pirates) Prove That Correlation Is Not Causation

When it comes to storytelling, we have a problem.

It’s not our fault though – as human beings we are hard-wired from birth to look for patterns and explain why they happen. This problem doesn’t go away when we grow up though, it becomes worse the more intelligent we think we are. We convince ourselves that now we are older, wiser, smarter, that our conclusions are closer to the mark than when we were younger (the faster the wind blows the faster the windmill blades…

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Added by Lee Baker on January 31, 2018 at 6:00am — 3 Comments

DescriptiveStats.OBeu v1.2.1 release on CRAN

DescriptiveStats.OBeu v1.2.1 release on CRAN

We are very pleased to announce DescriptiveStats.OBeu v1.2.1 on CRAN!

DescriptiveStats.OBeu is used on OpenBudgets.eu data mininig tool platform to estimate central tendency and dispersion of numeric variables along with their distributions and correlations and the…

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Added by Kleanthis Koupidis on September 30, 2017 at 2:27am — No Comments

Finding "Gems" in Big Data

(Photo credit:  Rob Lavinsky, iRocks.com – CC-BY-SA-3.0)

In 1945, Count ,Richard Taaffe* a Dublin gem collector, was sorting through a set of spinel gems that he had bought, and found one…

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Added by Peter Bruce on March 30, 2017 at 2:30pm — No Comments

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