Body Mass Index (BMI) and Exercise The following information was generated in St

Question

Body Mass Index (BMI) and Exercise The following information was generated in Stata from the Behavioral Risk Factor Surveillance System (BRFSS) data set we used in Lab 1. Recall that the exerany variable indicates whether the respondent exercised in the past month (1) or did not (0) and the variable bmi measures the ratio of a respondent's weight (in kg) to their squared height (in m). Answer the next series of questions based on this information. You do not need to rerun the analysis in Stata on your own Table 1: Stata output of summary statistics for bmi and exeraw summarize Variable Obs Mean Std. Dev. Min Max 20,000 20,000 26.30693 7457 5.218105 12.40045 73.09074 4354779 bmi exerany Table 2: Stata output of a correlation coefficient matrix for bmi and exerany, correlate bun s se bi exerany 1.0000 0.1073 1.0000 bmi exerany Table 3: Stata output from a simple linear regression of bmi on exerany df Number of obs = F (1, 19998 20,000 232.71 0.0000 0.011 0.0115 5.1881 Source MS Model Residual 1 6263.81569 Prob> F 6263.81569 538281.327 19,998 26.916758 R-squared Adj R-squared Total 544545.142 19,999 27.2286185 Root MSE Coef.Std. Err [95% Conf. Interval] mi 1.285136.0842444 -15.25 0.000 .0727484 374.790.000 1.450262 exerany cons 1.12001 27.40784 27.26525 27.12266 9) Which of the following conclusions can be inferred (with certainty) from the information provided in Tables 1-3. Mark all that apply The majority of individuals in the sample did not exercise in the past month. Individuals in the sample who exercised in the last month have a lower average BMI than those who did not. The average BMI of people who did not exercise in the past month is approximately 27.3 If more people in the sample were induced to exercise, the average BMI in the sample would decrease a) b) c) d) e) f) The variable exerany would be negatively correlated with obese, a dummy variable equal to 1 when an individual's BMI is greater than or equal to 30 None of the above

Explanation / Answer

a is wrong

b is right as average BMI is lower by 1.285

c is right as average BMI is approx 26.3

d is right as each additional indiidual who exercies has a lower BMI

e is right as exerany is negatively correlated to BMI

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---