Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
Description
Source of information
Intro 2.1
Imputation and derivation
Imputation
Intro 2.1
Others
Security
Intro 2.1
Notes
READ: Now Im going to say some more numbers, but this time when I stop I want you to say them backward. For example, if I say 9-2-7, what would you say?