Correlation tells you have two numerical variables relate to each other. It will tell you whether data points that have a higher than average value for one variable will also likely have a higher than average value for ...
Continue readingWhat is the difference between forecasting and prediction?
Forecasting and Prediction are two different things. You always forecast weather, but never predict the weather. Forecasting is nothing but a extrapolation of the past. You have some historic data, and you ...
Continue readingExplain p-value in simple terms
p-value in simple termsIf you are into Data Science, then you must have heard about p-value.I could have started it with a very superficial definition strolling around probability and significance and null hypothesis, etc. But that's already there ...
Continue readingConfusion Matrix in Data Science, meaning and example
What is Confusion Matrix?Confusion Matrix is a performance measuring technique for ML Classification model.Why do we need Confusion Matrix? Is measuring accuracy not enough?Confusion Matrix suggests the actual accuracy of your model. For example. Suppose I want to ...
Continue readingStatistics Interview Questions
Q1. What is a Sample? A. A data sample is a set of data collected and the world selected from a statistical population by a defined procedure. The elements of a sample are known as sample points, sampling units or observations. Q2. Define Population.
Continue reading50 Statistics Questions
Q1. What is a Sample? A. A data sample is a set of data collected and the world selected from a statistical population by a defined procedure. The elements of a sample are known as sample points, sampling units or observations. Q2. Define Population.
Continue readingCommon Statistical Tests
There are various statistical tests in Data Analysis, following are the tests and their use:-1. Correlation -> ...
Continue readingTests in Statistics – Chi Square Test
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Hypothesis testing is one of the most important topic in a Data Science course. Hypothesis tests evaluates two ...
Continue readingBasic Statistics
Data Science is 60% Mathematics and 40% coding and other things. Obviously, the numbers are random, but it makes complete sense. You need to defend your ...
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