I'm running an A/B test to see if the improved website layout increases revenue. First, I would like to check if the sizes of the control and experiment groups are statistically different.

I have data on the number of users visiting the site per day within 29 days. Below I will insert the data from the first 5 days:

    Day	Control Visits Experiment Visits
    1   1764	       1850
    2	1541	       1590
    3	1457	       1515
    4	1587	       1541
    5	1606	       1643

It seems to me that I should use the t- or z-test to achieve my goal, but so far I have used them to test statistical difference between population means, not their sizes.

P.S. This is the first question I asked on stackexchange. Any suggestions or tips on how I can improve the question will be welcomed.