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.
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
Today we are making Majestic Site Explorer free for verified domains. We are also removing restrictions on how often you can use Site Explorer for paying users (subject to a fair use policy). Other changes include layout improvements and some new stuff for all users – but I expect that the big news will be that Site Explorer is free for your own sites.
It’s easy to set up
We have now updated our Historic Index with data for start of May 2013. Here are the new stats:
Historic Index –
Unique Pages crawled: 472,383,604,906
Unique URLs: 3,584,026,567,247
Date range: 07 Oct 2007 to 08 May 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