Monday, 12 August 2013

Learning the Art of Statistical Analysis

Irrespective of how comprehensive and latest your data is; it does not make any sense to share it if nobody can infer from it. In order to infer from a set of data, one needs to take help of statistical analysis, a branch of Business Intelligence. It refers to a collection of techniques that processes huge amounts of data to make sense out of it by reporting trends, ideas, and conclusions. The analysis involves the compilation and examination of business data for taking right decisions. In the absence of these techniques, data remains passive or inactive, as it does not facilitate further actions.

The statistical analysis techniques range from straightforward methods that sum up the data in the form of averages, modes, and standard deviations to complicated approaches like regression that estimates the change in one variable based on changes in others. Irrespective of the technique implemented, performing a statistical analysis needs unambiguous research questions, cautious scrutiny, a deep vision, attention to minute details, and the knack to convey results in a comprehensible way.

Statistical analysis is widely used in a variety of fields such as business, geography, and science. Herein, the procedure of analysis involves expressing the nature of the data under analysis, describing the data’s relation to the underlying variables, forming a model to sum up this relation, proving the model’s validity, and using predictive analytics to predict future trends.

In order to learn statistical analysis, it is vital for you possess a fundamental understanding of economics and calculus. You need to join a statistics class at a known university or utilize some of the most valuable online resources. Through these resources or class, you get to learn about various statistical tools and techniques such as linear regression, probability, variance, hypothesis testing, correlations, associations, and error estimations. Of these, correlation and regression are most commonly used tools.

Regression analysis enables you to form an equation that represents the relations amongst various variables under analysis. On the other hand, correlation reveals the degree to which a specific variable changes when another variable changes. It is also important to learn how to look for errors in data. The simplest way to do so is to represent the data in a two-dimensional graph and look for uncertain observations. For instance, if the data set has the range of 200 to 600 units but you spot a value of 100, it is clear that number 100 is an error.