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## What is Linear Correlation?

The analysis of correlation is an extremely useful technique in business. Naturally, correlations are extremely popular in various analyses. Correlation is measured by a coefficient that is a statistical estimation of the strength of relationship between data. The...

Quartiles are a frequently used method to split the data and understand the spread. In general, data can be divided in various groupings such that an equal number of points are in each group. Such groups are formed by cutting at specific points called quantiles. If...

## The Assumptions in Linear Correlations

Given how simple Karl Pearson's Coefficient of Correlation is, the assumptions behind it are often forgotten. It is important to ensure that the assumptions hold true for your data, else the Pearson's Coefficient may be inappropriate. The assumptions and requirements...

## Measuring the Spread of Data

We have already seen how it is easier to describe data using a single measure of central tendency, such as, average. Now, take a look at the following data: The average score for both students is equal. However, John is consistent at everything, while Arun is...

## Are All Variables the Same?

Ernest Rutherford The aim of analytics is to find answers to problems. How do we find answers to the problems? We do that using data. When we begin to statistically analyse some data gathered through an experiment, we come across different types of data or variables....

#### Statistics Stuff

• Correlations
• Estimation techniques
• Confidence intervals
• Hypothesis testing
• One-way ANOVA
• Parametric tests
• Non-parametric tests
• What’s a time-series?
• Forecast by smoothing a time-series
• What’s seasonality?