Aregulation flag football game is played for minutes?

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

Does manufacturing in the midwest affect the nations economy

Should the government in china restrict the rights to the media/social media? why or why not?