A sociologist is doing a study on journalists. He attends a journalism conference, where he randomly surveys 390 journalists about the kind of automobile they own. Of these journalists 137 said that they own a compact car. There are about 1,700 journalists at the conference. About what percent of these journalists owns a compact car?

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