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22 Jul 2013, 05:08
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Difficulty:
25%
(medium)
Question Stats:
79% (01:52) correct
21%
(02:01)
wrong
based on 2503
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Public health official: Some researchers suspect that magnetic fields from high-voltage power lines can cause health problems for people who live especially near the lines. However, this is extremely unlikely: Beyond a distance of a few feet, the strength of the magnetic fields from high-voltage power lines is less than the average strength of magnetic fields in homes that are not located near such lines.
Which of the following would it be most useful to establish in order to evaluate the public health official's argument?
(A) Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
(B) What proportion of people who live near high-voltage power lines believe that those lines may cause health problems
(C) Whether high-voltage power lines are routed near residential dwellings in urban areas
(D) What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
(E) What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
Which of the following would it be most useful to establish in order to evaluate the public health official's argument?
(A) Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
(B) What proportion of people who live near high-voltage power lines believe that those lines may cause health problems
(C) Whether high-voltage power lines are routed near residential dwellings in urban areas
(D) What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
(E) What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
31 Jul 2019, 02:57
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aparnaharish
Public health official: Some researchers suspect that magnetic fields from high-voltage power lines can cause health problems for people who live especially near the lines. However, this is extremely unlikely: Beyond a distance of a few feet, the strength of the magnetic fields from high-voltage power lines is less than the average strength of magnetic fields in homes that are not located near such lines.
Which of the following would it be most useful to establish in order to evaluate the public health official's argument?
(A) Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
(B) What proportion of people who live near high-voltage power lines believe that those lines may cause health problems
(C) Whether high-voltage power lines are routed near residential dwellings in urban areas
(D) What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
(E) What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
Which of the following would it be most useful to establish in order to evaluate the public health official's argument?
(A) Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
(B) What proportion of people who live near high-voltage power lines believe that those lines may cause health problems
(C) Whether high-voltage power lines are routed near residential dwellings in urban areas
(D) What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
(E) What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
- Magnetic fields from power lines can cause health problems to people living close by.
- Far away homes have stronger magnetic fields (caused by something else at home) than the strength of magnetic field close to power lines.
Conclusion: It is unlikely that magnetic fields from power lines cause health problems to people living close by.
Mind you, we are talking about different kinds of magnetic fields - those generated by power lines and those generated at home by other sources. We are saying that magnetic fields from power lines are weaker in people's homes that are close by. Stronger magnetic fields exist in far away homes. So it is unlikely that magnetic fields from power lines can cause health problems (because they are weaker) and stronger fields already exist.
Which of the following is useful to evaluate:
(A) Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
We are asking whether the magnetic fields at home are harmful. If they are stronger and harmful like the magnetic fields of power lines, then it is true that weak fields of power lines may not be a source of worry. But say that magnetic fields of home at harmless - then it doesn't matter how strong they are, they will not cause any worries. The weaker fields of power lines may be a source of worry then because even the weak fields may cause health problems.
Basically, we are trying to find out whether the two types of magnetic fields are comparable. If they are not similar, then the argument may not hold since the argument is based on this comparison.
(B) What proportion of people who live near high-voltage power lines believe that those lines may cause health problems
People's beliefs have nothing to do with what actually happens. Irrelevant.
(C) Whether high-voltage power lines are routed near residential dwellings in urban areas.
Whether residential areas are near power lines is irrelevant. We want to find out what happens when they are close to power lines.
So our argument is what happens when A happens? Whether A actually does happen or not is irrelevant.
(D) What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
The actual diseases are irrelevant. We are talking about all health problems.
(E) What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
Our argument talks only about homes, not workplaces.
Answer (A)
General Discussion
22 Jul 2013, 07:24
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aparnaharish
Public health official: Some researchers suspect that magnetic fields from high-voltage power lines can cause health problems for people who live especially near the lines. However, this is extremely unlikely: Beyond a distance of a few feet, the strength of the magnetic fields from high-voltage power lines is less than the average strength of magnetic fields in homes that are not located near such lines.
Which of the following would it be most useful to establish in order to evaluate the public health official's argument?
A. Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
B. What proportion of people who live near high-voltage power lines believe that those lines may cause health problems
C. Whether high-voltage power lines are routed near residential dwellings in urban areas
D. What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
E. What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
Which of the following would it be most useful to establish in order to evaluate the public health official's argument?
A. Whether magnetic fields in homes that are not located near high-voltage power lines can cause health problems for the residents of those homes
B. What proportion of people who live near high-voltage power lines believe that those lines may cause health problems
C. Whether high-voltage power lines are routed near residential dwellings in urban areas
D. What specific diseases or conditions are suspected by some researchers to result from exposure to magnetic fields from high-voltage power lines
E. What is the average strength of magnetic fields in workplaces that are not located near high-voltage power lines
Point 1: Some researchers suspect that magnetic fields from high-voltage power lines can cause health problems for people who live especially near the lines.
Point 2: Public health official states that this is very unlikely as beyond a distance of a few feet, the strength of the magnetic fields from high-voltage power lines is less than the average strength of magnetic fields in homes that are not located near such lines.
We have to evaluate whether it is unlikely that those magnetic lines have a negative effect on health of people.
Among the available answer choices, A is relevant as it will affect the Public Official's statement most if answered affirmatively or negatively.
+1 A.
Regards,
