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SECTION ONE: DETERMINING IF THE FULL MODEL SUFFERS FROM MULTICOLLINEARITY, FINDING THE ROBUST MODEL AND DOES THE ROBUST MODEL SUFFERS FROM HETEROSKEDASTICITY An economist specializing

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SECTION ONE: DETERMINING IF THE FULL MODEL SUFFERS FROM MULTICOLLINEARITY, FINDING THE ROBUST MODEL AND DOES THE ROBUST MODEL SUFFERS FROM HETEROSKEDASTICITY An economist specializing in health care economics wants to measure the impact on economic growth based on consumers' lifestyles. There has been substantial work done on the growing numbers of people becoming overweight and obese. Studies have shown that the rate of people becoming overweight and obese is growing at an alarming rate. One study conducted by the NIH (National Institute of Health) indicated that by 2030, an estimated 38%% of the world's adult population will be overweight and an additional 20% of that population will be declared obese. Furthermore, that same study indicated that in the U.S., the most ominous predictions based on trends produced by the NIH show that over 85% of the adult population will be overweight or obese by 2030. The study indicated that some of the reasons the U.S., as well as the rest of the world, are experiencing such a phenomenon are poor dieting, lack of exercise, and smoking. The economist will be looking at factors that will impact people who are obese. The economist will investigate the body mass index. What is the body mass index? The body mass index is a figure that is derived from the mass (or the weight of the patient) and the patient's height. It is defined as taking the patient's body mass divided it by the square of the patient's height. The body mass index, or boj,(in short), is measured in kilograms per meter squared.In trying to assess factors impacting a patient's body mass index, which will be used as a proxy for determining if a person is obese. The economist will interview many people and some of the questions posed to the interviewees are: (a) Does the patient smoke? (b) Does the patient exercise? (c) How many calories, estimated, does the consumer consume daily? Below is the data: BMI Smoke Exercise Calories (Caloric intake, in thousands) 34.8 yes no 2.1 30.1 no 2.450 34.5 yes no 3.100 32.3 no 2.860 33.5 no 2.550 31.1 yes 2.900 32.7 yes 2.060 38.5 yes no 3.550 35.2 yes no 3.000 33.8 yes W'S 2.890 34.4 no 2.670 28.5 no 2.240 26.7 yes 3.000 29.8 yes no 2.330 34.1 yes no 3.480 37.2 yes no 2.965 32.2 yes 2.880 34.4 no 2.944 35.5 yes no 3.010 26.7 no 2.450 27.9 yes 3.000 30.8 yes no 2.75 32.8 yes no 2.89 35.1 no 3.12 38.2 yes no 3.47 25.5 yes 2.58 26.8 yes W'S 2.64 32.6 yes 2.96 34.5 no no 2.95 36.4 no 3.21The table shown below was produced by the NIH. Common Classifications of Body Weight in Adults and Children Age Indicator Normal Weight Overweight Obese 225.00 230.00 220 years BMI (kg/m) 18.50 to 24.99 RAWAA 25.00 6 Class 1: 30.00 to 54.99 Class 2: 35.00 to 39.99 29.99 Class 3: 240.00 Children Anturnsbonar > 2 10 $2 90 WHO 20061 0-60 months BMI Z or WHZ At risk of overweight >2 10 $3 50 WHO 20071 5-19 years BMI Z > 2 10 $1 90 >1 10 $2 90 >2 50 2-18 years Growth curve for OMI - 25 BMI - 30 BMI at age 18 USA. 2-19 yours BMI percentile 26th 10 485.h 265th to

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