Question

12 ponts while obesity s measured based on body fat percentage more than 35% body fat for women and more than 25% or men precisely measuring body fat percentage 5 difficult Body mass ndex BMI calculated as the ratio as an alternative indicator for obesity. A common critcism of BMI is that it assumes the same relative body fat percentage regardless of age, sex, or ethnicity. In order to determine how useful BMI is for predicting body fat percentage across age, sex and ethnic groups, researchers studied 202 black and 504 white aduits who resided in or near New York City, were ages 20-94 years old, had Bso 18-35and who volunteered to be a part of the study Participants reported their age, sex, and ethnicit and were measured for weight and height. Body fat percentage was measured by submerging the participants in waten 1. The paragraph above describes a is often used heigh B. Observational Study 2. What are the cases? A. Age, sex, and cthnicity B. 706 adults residing in or near New York City C. The calculated body mass index (BMI) D. People between age 20 and 94 3. Match the variable to its type: Ethnicity: ? Sex:? Age? BMI? Body fat percentage? 4. What is the research question? A. How should researchers measure body fat percentage? B. Is body mass index a good indicator for obesity? C. Do study volunteers have less obesity than average Ner York City residents? D. What is the average body fat percentage for New York City residents? 5. What is the population of interest? A. Residents of New York City who are obese B. All methods to measure obesity C. All adults D. All ethnic groups 6. What is the sample? A. The calculated BMI ofthe study participants B. The 202 black and 504 white men and women who participated in the study C. 20-94 year olds D. New York City residents 7. Can the findings of the study be generalized to the population? A. No, because the participants volunteered to be a part of the study B. Yes, because there was racial diversity among the subjects. C. No, because the measurements might be inaccurate D. Both a and c 8. Can the findings of this study be used to establish causal relationships? A. No, because this is an experiment B. No, because this is an observational study C. Yes, because the subjects volunteered to participate ● D. Yes, because this was an experiment

Answer 1