isidro survey phone call

[aspina7]

to be finalised once dictionaries are available:

• [ ] add a note to explain why age_group and sex are included as strata (that would normally be the sampling strata) and also that correcting for this is difficult in situations where dont have an accurate population estimates
• [ ] add commented-out code for generic weight calculations so ppl can account for population differences in clusters (isidro to send alex)

other points discussed:

• isidro to ask con about finite population correction
• tab_* broken -> gtsummary wrapper
• melbourne {epiR} -> sample size - potential use