Forum Moderators: martinibuster
The expected result was an increase in CTR.
About 40% higher than my previouse CTR.
But what concerns me, in one to 1.5 hours samples with around 400 to 1000 ad impressions, the CTR was Saturday and Sunday 3 times about twice the average CTR. Combined with unusual high EPC, CPM was up to 5 times average.
For this, I wanted to look in this great post about statistics and CTR change, maybe only 1 month old.
There had been tables about
100 1000 10000 samples and how significant is a CTR in this samle sizes.
But searching back in Forum89 and the local search engine with several different questions brought me not to this posting.
I used a search on Google with the option site:www.webmasterworld.com. This often gives better matching results than the internal search option.
Studing the post, I came to the conclusion, that I have also to use 3 different CTR per day time.
0am..8am Nearly only European visitors
8am..4pm Mixed
4pm..0am Nearly only US visitors
Each day segment has a different CTR and EPC characteristic.
Applying
Page impression -- (CTR change)/(ave. CTR)
10 -- +/- 2.04 (range of change from -2.04 to +2.04)
50 -- +/- 0.87
100 -- +/- 0.61
200 -- +/- 0.43
500 -- +/- 0.27
1000 -- +/- 0.19
5000 -- +/- 0.09
10000 -- +/- 0.06
Shows a 1000 sample has +/- 19% range.
100% above average would not be covered, but it seems that the average CTR of the first 8 hours is around 60% above all the day average.
With this, it's in range.
Before now everybody starts to translate all his pages to German:
The German pages are from 2002 to now.
Much more experience in creating content.
The main english site is mostly from 1997.
My first try for a web site.
