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02 Apr 2025, 14:04
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BMI is an inexpensive and easy-to-perform method of screening for weight category - for example, underweight, normal weight, or overweight. While BMI is simply a person's weight in kilograms divided by the square of the person's height in meters, research has shown that BMI is moderately correlated with more exact measures of body fat obtained via the use of methods that are more expensive and complex to use than is calculating BMI. Furthermore, BMI appears to be as strongly correlated with various body fat related health outcomes as are the other measures of body fat.
Which of the following conclusions is best supported by the statements above?
(A) There is no practical reason for using more complex and expensive methods for measuring a person's body fat rather than just using BMI.
(B) The more expensive and complex a method for measuring body fat is, the more exact are the measurements that it produces.
(C) BMI tends to be higher for people whose heights are relatively low.
(D) Generally, spending more than the cost of calculating BMI to measure a person's body fat will not increase the accuracy of predictions about that person's health.
(E) The more body fat a person has, the more important it is to use for measuring that person's body fat a method more complex and expensive than calculating BMI.
Which of the following conclusions is best supported by the statements above?
(A) There is no practical reason for using more complex and expensive methods for measuring a person's body fat rather than just using BMI.
(B) The more expensive and complex a method for measuring body fat is, the more exact are the measurements that it produces.
(C) BMI tends to be higher for people whose heights are relatively low.
(D) Generally, spending more than the cost of calculating BMI to measure a person's body fat will not increase the accuracy of predictions about that person's health.
(E) The more body fat a person has, the more important it is to use for measuring that person's body fat a method more complex and expensive than calculating BMI.
Do you think that the answer choice is fair? Out of POE, I was able to answer it even though I wasn't too entirely convinced with this answer choice. I feel like this answer choice isn't really the best since the passage does state that there's correlation between BMI and other methods and BMI and various body fat related health outcomes but just because there is correlation, it doesn't mean that it completely mimics the other methods and has the same accuracy as they do. Furthermore, the passage states "...that BMI is moderately correlated with more exact measures of..." which to me shows even more as to why this answer choice isn't really a good one. While the answer choice does use the word "Generally," I think it's unfair to assume it as a general thing. Just wanted to know what everyone's thoughts are and if this is a good question and answer.
09 Apr 2025, 07:17
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The best-supported conclusion based on the information provided is:
(D) Generally, spending more than the cost of calculating BMI to measure a person's body fat will not increase the accuracy of predictions about that person's health.
Explanation:
The key point in the passage is that BMI, despite being a simple and inexpensive method, is moderately correlated with more accurate measures of body fat, and is strongly correlated with health outcomes related to body fat. This implies that using more complex and expensive methods to measure body fat does not significantly improve the ability to predict health outcomes beyond what BMI can already provide. Therefore, spending more money on more complex methods likely doesn't improve the accuracy of health predictions, making (D) the most supported conclusion.
Why the other options are less supported:
(A): While it is true that BMI is correlated with health outcomes, the passage does not explicitly argue that there is "no practical reason" for using more complex methods. It just says that BMI is a reasonable alternative.
(B): The passage does not claim that more expensive methods are necessarily more exact, only that BMI is correlated with more exact measures, but doesn't make a direct comparison of precision between the methods.
(C): The passage does not discuss the relationship between BMI and height in a way that suggests BMI is higher for shorter people. BMI is calculated based on both weight and height, but this option introduces an unsupported claim.
(E): The passage doesn’t suggest that having more body fat makes complex and expensive methods more necessary. It only states that BMI correlates well with body fat and health outcomes, regardless of the amount of body fat.
Thus, (D) is the most strongly supported conclusion.
(D) Generally, spending more than the cost of calculating BMI to measure a person's body fat will not increase the accuracy of predictions about that person's health.
Explanation:
The key point in the passage is that BMI, despite being a simple and inexpensive method, is moderately correlated with more accurate measures of body fat, and is strongly correlated with health outcomes related to body fat. This implies that using more complex and expensive methods to measure body fat does not significantly improve the ability to predict health outcomes beyond what BMI can already provide. Therefore, spending more money on more complex methods likely doesn't improve the accuracy of health predictions, making (D) the most supported conclusion.
Why the other options are less supported:
(A): While it is true that BMI is correlated with health outcomes, the passage does not explicitly argue that there is "no practical reason" for using more complex methods. It just says that BMI is a reasonable alternative.
(B): The passage does not claim that more expensive methods are necessarily more exact, only that BMI is correlated with more exact measures, but doesn't make a direct comparison of precision between the methods.
(C): The passage does not discuss the relationship between BMI and height in a way that suggests BMI is higher for shorter people. BMI is calculated based on both weight and height, but this option introduces an unsupported claim.
(E): The passage doesn’t suggest that having more body fat makes complex and expensive methods more necessary. It only states that BMI correlates well with body fat and health outcomes, regardless of the amount of body fat.
Thus, (D) is the most strongly supported conclusion.
