Tying it all together!
Now let's dig into the NHANES design a little deeper so that we are prepared to analyze these data! Notice that I have re-created NHANES_design
, which we created in the last video. Remember that it contains the design information for NHANESraw
. The two important design variables in NHANESraw
are SDMVSTRA
, which contains the strata assignment for each unit, and SDMVPSU
, which contains the cluster id within a given stratum. Remember that the clusters are nested inside the strata!
This exercise is part of the course
Analyzing Survey Data in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Specify the NHANES design
NHANES_design <- svydesign(data = NHANESraw, strata = ~SDMVSTRA, id = ~SDMVPSU, nest = TRUE, weights = ~WTMEC4YR)
# Print summary of design
___(___)