I have a plethora of survey data from several thousand video conference calls.
After each call, users are asked to fill out a survey.
I have found a mysterious spike in a number of survey results during the month of April that is skewing my visualizations.
The spike can be seen here:
Here is a sample of the event data:
This makes no sense, as there was no surge in number of calls during this time. My data is corrupt, but I'm not sure how/why.
Please advise.