6 4 Points DETAILS PECKSTAT3 1 R 502 XP To examine the effect of exercise on body composition healthy women aged 35 to 50 were classified as either active nine or more hours of physical activity per week or sedentary Body fat percentage was measured and the researchers found that this percentage was significantly lower for women who were active than for sedentary women a Is the study described an experiment Yes the study is an experiment No this is an observational study If the study was an experiment what is the explanatory variable and what is the response variable If not explain why it is not an experiment The study described is an experiment The explanatory variable is the hours per week the women spent exercising and the response variable is the body fat percentage of the women The study described is not an experiment because there were no experimental conditions to which study participants were randomly assigned MY NOTE The study described is not an experiment because the researchers only used two classifications to describe the participants The study described is an experiment The explanatory variable is the age of the women and the response variable is the body fat percentage of the women The study described is an experiment The explanatory variable is the body fat percentage of the women and the response variable is the hours per week the women spent exig b From this study alone is it reasonable to conclude that physical activity is the cause of the observed difference in body fat percentage Justify your answer Yes it is reasonable to conclude that physical activity is the cause of the observed difference in body fat percentage This was an observational study so cause and effect be drawn Yes it is reasonable to conclude that physical activity is the cause of the observed difference in body fat percentage This experiment was done on a randomized camps of interest No it is not reasonable to conclude that physical activity is the cause of the observed difference in body fat percentage This was an observational study and c cannot be drawn one can the population