http://digfir-published.macmillanusa.com/stat_tutor_mpclone/stat_tutor_mpclone_individuals_and_variables_2009.html
Chapter
1. Individuals and variables
591c55e77894d24e59000005
http://digfir-published.macmillanusa.com/stat_tutor_mpclone/stat_tutor_mpclone_individuals_and_variables_2009_dlap.xmlDLAP questions591c55e77894d24e59000005