Help using Base SAS procedures

proc surveyselect

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proc surveyselect

hi,

i have a dataset that has customers who can be contacted by month and communication channels, for a campaign.

i need to sample these customers within each cell (example - Nov09 & Call, Nov09 & Email, Dec09 & Email, Dec09 & Call...etc) into 2 groups - 10% Control, 90% Test.

how do i do this? i think i can use some modification of stratified sampling, but haven't got it yet. any suggestions?

thanks!
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