Ateacher wants to know whether the students in the entire school prefer watching television or playing outdoor games after school. the teacher draws a random sample from the following groups: all school teachers all students on the football team all boys in each grade all students in each grade which of the following groups best represents the population from which the teacher should take a random sample to get the best results for her survey?

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0