Goog - من هو کولبرج
من هو لورنس کولبرج​

An education expert is researching teaching methods and wishes to interview teachers from a particular school district. she randomly selects ten schools from the district and interviews all of the teachers at the selected schools. which type of sample did she use in this study? a)systematic sample b)probability sample c)stratified sample d)cluster sample

The graph shows the federal budget from 1980 to 2010. in which period did the federal budget show the greatest deficit? 1980 to 1990 1980 to 2000 1990 to 2000 2000 to 2010

After about 1000 b.c, some people in siberia meaning their lives wre bassed on herding animals. a. pastoral b. collective c. irrigate d. dalits