17 Tres hombres, A, B y C, viajaban con sus esposas, a, b y c. Llegaron a un
río que tenían que cruzar. Solo había un
bote y solo dos podían cruzar a la
vez. Como los maridos eran celosos,
ninguna mujer podía quedarse con un
hombre a menos que su marido también
estuviera presente. ¿Cómo cruzaron
el río?

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