However, (of course) the possibility is not zero. Even an ad with a CTR of only 2% can generate 4 clicks out of 4 impressions. Let me repeat: unlikely , but not impossible . That’s why statisticians I hope you understand don’t immediately give an answer when asked whether there is a difference in CTR between two ads. As impressions increase, the probability of an answer increases, but there is not enough information to give a definitive answer. Therefore, when a magician declares that he will draw the desired card from a deck of playing cards, and when he actually draws the desired card, the average geek exclaims with joy and exclaims. Statistically impossible!” .
This is because they know that the chance of getting
The card in question by luck is less than 5%. Next, let’s assume we have two ads. Ad A’s CTR is 2%, and Ad B’s CTR is represented by the X-axis in the graph below. This graph shows the indonesia cell phone number number of impressions (per ad) where there is a 95% chance that the two ads. Have different CTRs. ad B had. CTR of 3%, you would need nearly 4,000 impressions to be 95% sure that ad. B will outperform A. So if the difference in. CTR you see between your ad’s performance on Friday and Saturday is only 200 impressions, it’s hard to say it’s a huge difference.
CTR approaches 2%, more data is needed to differentiate
Between the two ads. To differentiate between an ad with a 2.00% CTR and an ad with a 1.95% (or 2.05%) CTR, you would need at least 1 million impressions for each. Also, if two ads are Thailand Phone Number List performing similarly with a CTR of 2.00%, no matter how much data you have, you won’t be able to tell them apart. some web-based CTR differential tools seem to completely ignore this point.
