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The number of North American children who are obese that is,

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The number of North American children who are obese that is, [#permalink]

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New post 12 Sep 2009, 23:20
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The number of North American children who are obese—that is, who have more body fat than do 85 percent of North American children their age—is steadily increasing, according to four major studies conducted over the past 15 years.
If the finding reported above is correct, it can be properly concluded that
(A) when four major studies all produce similar results, those studies must be accurate
(B) North American children have been progressively less physically active over the past 15 years
(C) the number of North American children who are not obese increased over the past 15 years
(D) over the past 15 years, the number of North American children who are underweight has declined
(E) the incidence of obesity in North American children tends to increase as the children grow older

please explain ur answers.
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Re: North American children [#permalink]

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New post 13 Sep 2009, 03:56
Along with the obese non-obese are also increasing .So IMO C
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Re: North American children [#permalink]

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New post 14 Sep 2009, 11:59
I'm going to go with C too.

It's stated that obesity is defined as having more body fat than 85% of the population. Therefore 15% of children are obese. So if the number of obese children are increasing then that means the number of children must be increasing since the percentage doesn't change. We can conclude that C the number of not obese children are increasing as well.
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Re: North American children [#permalink]

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New post 14 Sep 2009, 12:23
The number of obese children is increasing while the percentage is the same. This would happen only when the group size increases.

IMO C
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Re: The number of North American children who are obese that is, [#permalink]

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New post 03 Jul 2014, 11:48
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Re: The number of North American children who are obese that is, [#permalink]

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New post 03 May 2015, 17:04
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Re: The number of North American children who are obese that is, [#permalink]

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New post 07 Jun 2016, 23:46
talk2pk wrote:
The number of North American children who are obese—that is, who have more body fat than do 85 percent of North American children their age—is steadily increasing, according to four major studies conducted over the past 15 years.
If the finding reported above is correct, it can be properly concluded that
(A) when four major studies all produce similar results, those studies must be accurate
(B) North American children have been progressively less physically active over the past 15 years
(C) the number of North American children who are not obese increased over the past 15 years
(D) over the past 15 years, the number of North American children who are underweight has declined
(E) the incidence of obesity in North American children tends to increase as the children grow older

please explain ur answers.



From the argument :

Definition of obesity : bf> 85% of NA kids. So 85% people always need to have bodyfat less than whatever is the current obesity level.


85% = no. of non obese/ (no. of obese + no. of non obese)

So if no. of obese is increasing, to keep the 85% constant. no. of non obese has to increase as well. Else there will be a drop in 85%.

Clearly C
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Re: The number of North American children who are obese that is,   [#permalink] 07 Jun 2016, 23:46
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