{"version":"1.0","provider_name":"GRIVENTO","provider_url":"https:\/\/grivento.com","author_name":".","author_url":"https:\/\/grivento.com\/index.php\/author\/admin\/","title":"How I create representative samples when running surveys","type":"rich","width":600,"height":338,"html":"
How I create representative samples when running surveys<\/a><\/blockquote>