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The graph shows the number of coniferous trees of each of 4 species at

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Sajjad1994
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The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   21 Apr 2021, 08:30
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The graph shows the number of coniferous trees of each of 4 species at each of 5 sites located in a large ecological reserve.

Map

Black: W
Dotted White: X
Blue: Y
Sky Blue: Z

Select from the drop-down menus the options that create the statement that most accurately reflects the information provided.

Comparing the total number of Species W trees at a site to the number of Species X, Y, and Z trees at that site, the graph shows the strongest positive correlation between the number of Species W and Species trees, and the strongest negative correlation between the number of Species W and Species trees.



IR Butler 2021 - Practice 2 IR Questions Everyday.
Question # 179, Date : 21-Apr-2021
This question is a part of IR Butler 2021. Click here for Details


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Dropdown 1: Y Dropdown 2: Z
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KanikaMalik141
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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   30 Aug 2021, 21:07
Can someone explain answers to this question, please?
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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   30 Aug 2021, 23:48
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Question asks us to find species of trees which are positively and negatively correlated to W trees at all the sites, i.e; if W trees are more the positively correlated species should be too and vice versa, whereas for negatively correlated species it should be otherwise.
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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   30 Dec 2021, 00:24
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The question appears incomplete because there is no key as to which colour on the bar graph each tree type- X, Y, Z and W refer to respectively
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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   30 Dec 2021, 01:59
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palaknayyar wrote:
The question appears incomplete because there is no key as to which colour on the bar graph each tree type- X, Y, Z and W refer to respectively


I agree; I probably do not have a complete diagram, so I have added a diagram map to the question.
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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   30 Dec 2021, 02:03
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The same data would have been straightforward to understand if presented in another form.



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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   11 Dec 2022, 23:39
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KanikaMalik141 wrote:
Can someone explain answers to this question, please?


There are 3 types of correlations:
1. Positive correlation: when X increases, Y increases
2. Negative correlation: when X increases, Y decreases
3. No correlation: when data are chaotically plotted in the scatter plot

Q1, Positive Correlation. We recognize that when the Black bar increases that of Blue also increases except site 3, called outlier
Thus, for Q2 we have only 2 options: either Z or X
Q2, Negative Correlation. We can see when X decreases, Z increases: Site 2: X decreases and Z increases; Site 3: X increases and Z decreases; Site 4 and 5: X decreases and Z increases.
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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink] New post   29 Mar 2024, 06:46
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Re: The graph shows the number of coniferous trees of each of 4 species at [#permalink]
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