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How exact are Google Analytics' Results?

Recent data contradicts that of Netinsight

         

gdjones83

5:24 am on Jan 8, 2008 (gmt 0)

10+ Year Member



Hello,
This has probably been discussed previously although I've had a detailed look through recent threads and haven't seen it so I'll go ahead and post.

My company is in the process of moving from netinsight to google analytics, mainly because of the cost difference, its hard to compete with free in the eyes of the accounts team. Anyway we have a number of websites so I decided to see how comparable the data from each tracking system is on one of the smaller sites. After GA had been installed for a month and seemed to be given stable data I compared its results with that of netinsight over the same 10 day period, the total visits on Netinsight showed around 3,300 visitors in this time, GA however showed only 2,400, the trends in results continued through all of the data I compared, with GA giving significantly reduced results.

I was expecting a slight difference but if this sort of loss is to be expected on all the websites I'm going to have a bit of explaining to do as to why our traffic appears to have nosedived (even if it hasnt).

Do you think that having both tracking codes installed on one page leads them to perhaps interfere with each other?
Is this a loss I'll have to just take on the chin, if so its a pity as it means I will have no comparative data from previous years to gauge how successful the sites are for the next few years.

I've heard that GA is slower at reading its coding than most and that I should ensure that the GA tracking code is as high up the HTML as possible but do you think that that alone could count towards a difference of this much?
Any advice would be appreciated

for_si2003

5:18 pm on Jan 8, 2008 (gmt 0)

10+ Year Member



Google Analytics will slow down your page. So it is placed just before </body>. The google page is accurate. My guess is it should not interfere with other code. Both will have an independent javascript.