I04-01

Question

The table below provides information on the local environmental conditions for 14 individual trees, representing 11 of the 75 tree species found in the Monongahela National Forest, West Virginia.
      Tree Species   Elevation   Moisture   Topographic Roughness   Landform   Soil Series       American chestnut   moderate   low   high   ridge   Lily       American chestnut   high   low   high   ridge   Lily       Basswood   low   high   high   toe slope   Cateache       Chestnut oak   moderate   low   high   ridge   Lily       Hemlock   high   high   low   toe slope   Ernest       Pine   moderate   high   low   bench   Allegheny       Pine   moderate   high   low   bench   Allegheny       Red oak   high   low   high   bench   Cateache       Red spruce   high   moderate   low   toe slope   Mandy       Red spruce   low   high   low   valley   Allegheny       Spruce-pine   moderate   high   low   valley   Potomac       Sugar maple   high   moderate   high   ridge   Belmont       Sycamore   low   high   low   valley   Atkins       White oak   low   high   low   valley   Weikert

For each of the following statements, select  Sufficient  if the information in the table is enough to  disprove  the claim regarding the tree species. Otherwise, select  Not sufficient .

Bunuel · Answer

Official Solution:

For this question, we need to determine if the information in the table is sufficient to  disprove  the statement.
 
 Statement 1: 
 
The table shows that Red spruce can grow in both Mandy and Allegheny soils, disproving the claim. Therefore, the information in the table is sufficient to disprove this statement.
 
 Statement 2: 
 
The table shows two species, American chestnut and Red spruce, growing at different elevations, disproving the claim. Therefore, the information in the table is sufficient to disprove this statement.
 
 Statement 3: 
 
The table provides data for only 11 species and does not include information on all 75 species in the forest, making it impossible to confirm or disprove the claim for the entire forest. Therefore, the information in the table is not sufficient to disprove this statement.

Correct answer:

Each species of tree in the Monongahela National Forest can survive in only one soil series.  "Sufficient"

Each species of tree in the Monongahela National Forest can survive at only one elevation.  "Sufficient"

The number of tree species located in valleys within the Monongahela National Forest is greater than the number located on ridges.  "Not sufficient"

Bunuel · Answer

I have revised the question, solution, and formatting by adding more details to enhance clarity.

Dbrunik · Answer

would have gotten this right if i had read disprove. i had it completely opposite.

Dbrunik · Answer

I think this is a  high-quality  question and I agree with explanation.

ragnarok13 · Answer

@ Bunuel  @ Bismuth83  @ chetan2u How can we make an assessment regarding each species of tree from the given table, when the table represents only 11 of the 75 species in the forest?

Bunuel · Answer

For the first two statements, we can  disprove  the claims using only the 11 species listed in the table, so the other 64 species are irrelevant.

For the third statement, the claim requires an assessment of all species in the forest. Since the table only includes 11 species, we lack the necessary information, making the table  not sufficient  to disprove the claim.

ragnarok13 · Answer

Understood! Thanks a lot!

This aspect of the information about the 11 species being sufficient enough to disprove had not seemed obvious to me at all

jcrafer · Answer

I like the solution - it’s helpful. high quality question!

RITESH1984 · Answer

Q3
I got it right but for wrong reason, I looked at the table and found out that Valley has 4 species and Ridge has 3 species so the statement given is correct, hence it doesn't disprove the statement. 
I was not even near to the correct reasoning.

Shrimp04 · Answer

I like the solution - it’s helpful.

Edwin555 · Answer

I like the solution - it’s helpful. That was a tricky one! These questions are really helping me understand how GMAT works!

corpsealion · Answer

this is a very high quality question!

harsha77 · Answer

I like the solution - it’s helpful.

Tanishka9 · Answer

I like the solution - it’s helpful. thanks

Tanishka9 · Answer

I like the solution - it’s helpful. thanks

Karym · Answer

I like the solution - it’s helpful.

rationebeatae · Answer

I did not quite understand the question. the information aove the table says only 14 of 75 species are specified in the table; the question asks about all the species in the forest; how is it relevant?

Bunuel · Answer

Your doubt is address  HERE . Please review.

I04-01

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Tree Species	Elevation	Moisture	Topographic Roughness	Landform	Soil Series
American chestnut	moderate	low	high	ridge	Lily
American chestnut	high	low	high	ridge	Lily
Basswood	low	high	high	toe slope	Cateache
Chestnut oak	moderate	low	high	ridge	Lily
Hemlock	high	high	low	toe slope	Ernest
Pine	moderate	high	low	bench	Allegheny
Pine	moderate	high	low	bench	Allegheny
Red oak	high	low	high	bench	Cateache
Red spruce	high	moderate	low	toe slope	Mandy
Red spruce	low	high	low	valley	Allegheny
Spruce-pine	moderate	high	low	valley	Potomac
Sugar maple	high	moderate	high	ridge	Belmont
Sycamore	low	high	low	valley	Atkins
White oak	low	high	low	valley	Weikert

Sufficient	Not sufficient
		Each species of tree in the Monongahela National Forest can survive in only one soil series.
		Each species of tree in the Monongahela National Forest can survive at only one elevation.
		The number of tree species located in valleys within the Monongahela National Forest is greater than the number located on ridges.