[كياني]

In a diabetes study to investigate the effect of medicine,exercises and diet on patients,the randomly selected patients are divided into four groups randomly.the first group is given a medicine only.the second groub is given a medicine and special diet.the third group is given a medicin and special exercises.the fourth group is given a special diet and exercises.after six months,the averages of the blood sugar level for the four groups are compared


Q1-the confounding variable(s)for the the second group is (are :

A)diet. B)medicine. C)exercises and diet. D(exercises


Q2-the indepentend variable is ( are) for the second group is (are) ....
A)exercises and diet. B) medicine and diet. C) medicine. D) medicine and exercises



Q3-the dependent variable is ( are) for the second group is (are(:

A-medicine and diet. B-six month. C.patients. D.blood sugar level