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The World Health Organization (WHO)

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The World Health Organization (WHO) [#permalink] New post 15 Jul 2012, 06:01
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The World Health Organization (WHO) has produced a comprehensive set of growth standards for children. These standards are based on studies of children living in 6 nations on 5 continents under optimal conditions with respect to health and nutrition. The table displays the percentil distribution of height, in centimeters, at 3-month intervals, for boys ages 2 through 5 according to the WHO model. In a model population -- a large population of boys ages 2 through 5 that conforms to the WHO growth standards -- for n = 3, 15, 50, 85, and 97, nth percentile in height for a given age is the unique height among boys of that age that is greater than or equal to n percent, and less than or equal to (100- n) percent, of heights of boys of that age.

refer fig 1
Attachment:
File comment: Fig 1
fig1.JPG
fig1.JPG [ 47.24 KiB | Viewed 1861 times ]


The graph shows the percentile distribution of weight, in kilograms, for heights from 80 cm to 120 cm, for boys ages 2 through 5, according to the WHO model. In a model population, for n = 3, 15, 50, 85, and 97, the nth percentile in weight for a given heigh is the unique weight among boys of that height that is greater than or equal to n percent, and less than or equal to (100 - n) percent, of weights of boys of that height.

refer fig 2
Attachment:
File comment: Fig 2
fig2.JPG
fig2.JPG [ 29.31 KiB | Viewed 1861 times ]

For each of the following statements, select Yes if the statement must be true of a boy selected at random from a model population. Otherwise, select No.


A. If his age is greater than 3 years 3 months, the probability that his height is at least 98.0 cm is greater than 50%.


B. If he is at least 105 cm tall, the probability that his weight is 14.0 kg is no greater than 3%


C. If he is 114 cm tall, he is taller than at least 85% of boys his age.

[Reveal] Spoiler: OA
A yes
B Yes
C No

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Last edited by maybeam on 15 Jul 2012, 10:05, edited 1 time in total.
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Re: The World Health Organization (WHO) [#permalink] New post 15 Jul 2012, 09:44
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Re: The World Health Organization (WHO) [#permalink] New post 15 Jul 2012, 10:06
carcass wrote:
For me is difficult to make an answer due to the layout on a forum, or website :(

made some changes

the first table is height vs age

and the second table gives the relationship b/w
height vs weight.

Hope this will be helpful
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Re: The World Health Organization (WHO) [#permalink] New post 16 Jul 2012, 03:33
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Re: The World Health Organization (WHO) [#permalink] New post 16 Jul 2012, 06:19
carcass wrote:
1) yes ---> 3.3 --> 50th--> 98.0.

2) yes ---> at least 3rd ---> line black

3) no ----> at least 85% line green -----> no



the definition is as nth percentile in height for a given age is the unique height among boys of that age that is greater than or equal to n percent, and less than or equal to (100- n) percent

so for Q.A : how can you be sure that the probability is greater than 50%
it can be 50% as well, right?
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Re: The World Health Organization (WHO) [#permalink] New post 16 Jul 2012, 08:13
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Re: The World Health Organization (WHO) [#permalink] New post 16 Aug 2012, 09:43
can someone please explain the tabs? I cant understand the tabs.
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Re: The World Health Organization (WHO) [#permalink] New post 02 Aug 2013, 13:45
carcass wrote:
1) yes ---> 3.3 --> 50th--> 98.0.

2) yes ---> at least 3rd ---> line black

3) no ----> at least 85% line green -----> no


why are you looking at the Height-Weight relation (Green line) for #3.) ? The question just states the height which can be traced from graph 1. No ?
Re: The World Health Organization (WHO)   [#permalink] 02 Aug 2013, 13:45
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