Do not consider any facts that are not directly mentioned in this problem. Which scenario(s) contain an example of a lurking variable. One: According to a study done at Kaiser Permanente in C.A., users of oral contraceptives have a higher rate of cervical cancer than non-users. Investigators concluded that the pill causes cervical cancer. Two: A baby music company tells it customers that playing classical music while your child sleeps is directly linked to increased intelligence. A doubtful customer looks into this and finds a study pointing out that highly involved parents are more likely to expose their child to classical music and that this high involvement leads to greater intelligence for their children. Three: Bob wears bigger shoes than Jerry. Bob has bigger feet. O Two only O One only. O Three only O One and TwoCS Residuals by X 15 10 5 The term that describes the pattern in the plot below is Residuals 0 5 10 -5 15 -10 -15 X Variable O Heteroscedastic because the spread of the points does not change. O Homoscedastic because the spread of the points changes. O Homoscedastic because the spread of the points does not change. O Heteroscedastic because the spread of the points changes.Question 3 County Hospital Plush Medical Procedure M Avg Price Procedure M Avg Price Hip Replace 100 300,000 Hip Replace 10 325,000 Heart Stent 250 200,000 Heart Stent 15 215,000 Skin Graft 500 100,000 Skin Graft 25 125,000 Total 850 152,941 Total 50 155,000 Chaste Bank 3rdI5th Bank Marketing Count Avg Return Marketing M Avg Return Mail 500 3,000 Mail 150 3,200 Email 350 2,000 Email 400 2,100 Facebook 12: 1,500 Facebook 600 1,800 Total 975 2,443 Total 1.150 2.087 O The reason the paradox is occurring in the bottom tables is that Chaste Bank has most of its count where the average return is the lowest, and 3m15th has most of its count where average return is the highest. 0 The reason the paradox is occurring in the top tables is that County Medical has most of its count where average price is highest, and Plush Medical has most of its count where average price is lowest. 0 The reason the paradox is occurring in the top tables is that County Medical has most of its count where average price is lowest, and Plush Medical has most of its count where average price is highest. 0 The reason the paradox is occurring in the bottom tables is that Chaste Bank has most of its count where the average return is the highest, and 3rdf5'h has most of its count where average relum is the lowest