Ella completed the following work to test the equivalence of two expressions. What conclusion can you draw from Ella’s work? The expressions are equivalent because Ella got a different result when she substituted zero for f. The expressions are equivalent because Ella got the same result when she substituted zero for f. The expressions are not equivalent even though Ella got the same result when she substituted zero for f. The expressions are not equivalent because Ella did not know that you can’t use substitution to test for equivalence.

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