Archive for the ‘Research’ Category

Majestic SEO Beginners Guide to Correlation: Part 4

By Neep Hazarika July 15, 2013

In Parts 1, 2 and 3, we looked at statistical measures of datasets that were purely one-dimensional in nature, i.e., all the observations constituting the dataset were of the same type.  Examples of such datasets are the time elapsed between eruptions of the Old Faithful Geyser

Posted In: Research

A Study of Subnet/ IP Link Ratios

By Neep Hazarika June 25, 2013

This short blog is in response to a recent support ticket querying whether particular domains display significant differences in terms of the ratio of referring subnets to referring IP addresses. We were asked what a “normal” value of this ratio could be.

A statistical study was performed on the Majestic Million data. We found that typical values lay within the range 1.2 to 1.8… Continue reading

Posted In: Research

MajesticSEO Beginners Guide to Correlation: Part 3

By Neep Hazarika June 18, 2013

In Parts 1 and 2, we have looked at the definitions of correlation, population and sample size. In this part, we will go through the essentials of the mathematics involved.  Before we can proceed any further, however, we have to define certain fundamental statistical concepts.

Statistical Measures of a Data Set

In this section, it will be assumed that… Continue reading

Posted In: Research

Identifying a Bad Backlink Profile

By Barrie Smith June 4, 2013

(This is a guest post by Barrie Smith. His observations and insights are his own.)

I have recently been keeping a tab on Google page 1 results for “Payday Loans” – a search term historically showing results of websites ranking having used spammy, dodgy and/or underhand link building techniques.

Even in the year 2013 – more than 12 months after the Google Penguin algorithm update was… Continue reading

Posted In: Research

MajesticSEO Beginners Guide to Correlation: Part 2

By Neep Hazarika May 8, 2013

In Part 1, we looked at how correlation can be  used to examine relations or associations between variables in a data set. We described the different types of correlations, and presented the advantages and disadvantages of the correlation technique to analyse data. This part will attempt to ease the reader into methods of quantifying correlation.

Correlation Coefficients

Up till now, correlation has been defined as a measure of… Continue reading

Posted In: Research