Number of wrong orders out of total orders placed every day for 60 days as the pre sample (significant variation eg 2 wrong out of 6 on day 1, 5 wrong out of 15 on day 2, and so on till day 60)

Intervention to decrease the number of wrong orders placed

Similar data collected for next 60 days

What test do I use? Mann Whitney? Unpaired t test? Some other test? How do I analyze this data?

Thanks for your help