Exercise 1: You are an obstetric nurse, and you've seem to have noticed that babies born from mother having taken the Prescription drug A have babies with slightly smaller head circumference. You therefore, after getting IRB approval and informed consent from mothers, take measurements on a (random) sample of babies born to mothers who took "Prescription Drug A" during pregnancy were compared to measurements on a (random) sample of babies born to mothers who did not take "Prescription Drug A". You knwo that a number of variables can affect the head circumerence at bith, such as mother nutrition, age, socio-economic class, smoking, and many others. Below is the data table from the pilot study. No Drug Drug A 34.5 35.75 37.21 29.75 32.25 37.23 38.24 36.14 38.75 33.54 35.23 31.27 35.65 28.12 37.21 30.84 36.78 31.45 37.12 29.54 29.51 1. How many variables do we have here ? DEfine the type of variable (2 keywords) . Bonus - 1 pt - is there a dependent varaible ? independent variable ? controled variables ? which one are they ? (2 pts + 1 bonus) 2. Calculate mean, median , and make a descision if the data is symetricallty distributed or not (2 pts) 3. give a numerical summary of the data abve - depending on your descision in question 2 (2 pts) 4. Describe the data graphically on your draft paper - explain here what is the graphical representation you choose !(remember to choose a proper number of "bins" to represent the data properly) (2pts) 5. Would you design the study differently and why