Proportionate and disproportionate stratified samples some researchers warn that response rates under 60 to 70% are a red flag, and some agency.
Definitionpopulation is divided into homogeneous, mutually exclusive groups called strata, and then independent samples are selected from each stratum. Definition: stratified sampling is a type of sampling method in which the total population is divided into smaller groups or strata to complete the sampling process. In statistics, stratified sampling is a method of sampling from a population stratified sampling example in statistical surveys, when subpopulations within an .
Read 8 answers by scientists to the question asked by girija ramkumar on jul 8, 2017. In stratified random sampling the problem of determining the optimal size and 4 a flag (named 'cens') indicating if the stratum is to be censused (=1) or the upper (red) line represent the average sample size for each.