Simon Fraser University7 年
Stratified Sampling
The following PROC SURVEYSELECT statements select a probability sample of customers from the Customers data set according to the stratified sample design. title1 'Customer Satisfaction Survey'; title2 ...
Simon Fraser University7 年
PROC SURVEYSELECT Statement
If you request a stratified sample design with a STRATA statement and specify the CERTSIZE ... If you specify METHOD=PPS_WR, you must name the size measure variable in the SIZE statement. requests ...
isixsigma on MSN1 个月
Random Sampling: Key to Reducing Bias and Increasing Accuracy
For example, you might decide to randomly select ten items every hour from a production line. Stratified Random Sampling – If ...