Answer Happy

(3 points) In order to determine how useful BMI is for predicting body fat percentage across age, sex, and ethnic groups in adults, researchers studied 202 black and 504 white adults who resided in or near New York City, were ages 20-94 years old, had BMis of 18-35 kg/mº, and who volunteered to be a part of the study. Participants reported their age, sex, and ethnicity and were measured for weight and height. Body fat percentage was measured by submerging the participants in water. Which of the following correctly describe the variables and their types. A. Age (numerical, discrete), sex (categorical), ethnicity (categorical), weight, height, body fat percentage (numerical, discrete). B. Age (numerical, continuous), sex (categorical), ethnicity (numerical), weight, height, body fat percentage (numerical, continuous). OC. Age (numerical, discrete if it is in years), sex (categorical), athnicity (categorical), weight, height, body fat percentage (numerical, continuous). D. Age (numerical), sex (numerical), ethnicity (categorical), weight, height, body fat percentage (numerical). What is the researcher's desired population of interest and what is the sample for this study? O A. Population of interest: All adults, Sample: 202 black and 504 white adults. B. Population of interest: 202 black and 504 white adults, Sample: All adults. OC. Population of interest: All adults in New York City, Sample: 202 black and 504 wnite adults. D. Population of interest: 202 black and 504 white adults, Sample: All adults in New York City. Can the results of the study be generalized to the population? A. No; all of the people surveyed were from the same location, so the results can't be generalized to the entire population. OB. No the survey was voluntary, so the results can't be generalized to the entire population. OC. No; there is not enough racial diversity in the study, so the results can't be generalized to the entire population. OD. All of the answers above are correct.