I have signed up for Google analytics and Google webmaster tools yesterday and my adsense earnings dropped by 40% Before the avg CPM is $2.XX Today the avg CPM is $0.80 Is this common to everyone after adding analytics code to website ?
How long you have monitored this ? If you have checked this only for 1 or 2 days then better wait at least a week. it might not be Google analytics.
Analytics won't affect your AdSense earnings in any way. Remember that it is a weekend and naturally, there are less people browsing the internet. As bluearrow suggested, wait a week or so before making assumptions. All the best.
pure coincidence .. One day is not even enough to draw a statistical conclusion.. besides.. it's Saturday..
There are some that say they are evil and want you to sign-up for AdWords to improve you traffic. Not me though, I didn't say it.
i think there is no relation between analitics & web tools and adsense earning. there must be different reasons to decrease your adsense earning