Translations:Growth/Analytics updates/Welcome survey initial report/76/en

Sanity checks
We have also run various sanity checks on our data in order to ensure that things are working properly. For example, we have calculated the distribution of users assigned into the survey and control groups, which ideally should be 50/50. This also turns out to be the case, overall on Czech Wikipedia the proportions are 49.7%/50.3% survey/control, and on Korean Wikipedia it is the other way around. We do find some variation when accounts are split into registrations from desktop and mobile (e.g. that it's 47/53 in some cases), but not enough to warrant a concern that the randomization has led to imbalanced or biased groups.