Question 8 of 10 In an experiment to see if having a nurse come three times to visit the homes of newborn babies reduces doctor visits what is the independent variable? A. Subjects in the experimental group B. The control group C. The number of visits to the doctor D. The nurse visits

The independent variable in an experiment is the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable.<br /><br />In this case, the experiment is designed to see if having a nurse come three times to visit the homes of newborn babies reduces doctor visits. The variable that is being manipulated is the number of nurse visits.<br /><br />Therefore, the correct answer is:<br /><br />D. The nurse visits