Happy April fools day who wants to talk

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

To take a standard test such as the psat or plan students must have an

Japan’s key exports to africa and southwest asia are mostly a) raw materials. b) human capital. c) manufactured items. d) agricultural products.