I am analyzing the data of my CBC and I want to detect some outliers.
Is there something like a threshold for "speeders"?
The median of elapsed time is around 8 minutes. But I have some respondents, who only needed 2-3 minutes. I also have some respondents, who needed over an hour. But I find it really difficult to say from that, who filled in the survey seriously and who didn't. I mean it could be, that someone was interrupted during the survey and finished it later.
But if the median of the elapsed time was 8, I guess 2-3 minutes are not realistic right?
Do you have any advice or is there a Sawtooth paper about rules if thumb I can use?
Thank you in advance.