Which of the following best summarizes the result of attacks in no-man's-land during world War 1

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

Read the passage from the caged bird the connotation of narrow in the passage creates a feeling of

Experiment to investigate effect of medication on levels of stress in males and females. dependant variable?