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25 Nov 2023, 03:11
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Researchers studying long-term changes in regional mouse populations have found that by focusing on the populations of a rare but widespread and easily identifiable species of mouse (Species X), they can make fairly accurate estimations about the total regional mouse populations.
In a report on a recent study that included the data tables that follow, the researchers provided some addenda:
1. The Species X population of Region CV increased by 123,995 between 1990 and 2005.
2. In contrast, the Species X population of Region EW declined by about 52% during that same time.
In a report on a recent study that included the data tables that follow, the researchers provided some addenda:
1. The Species X population of Region CV increased by 123,995 between 1990 and 2005.
2. In contrast, the Species X population of Region EW declined by about 52% during that same time.
The total mouse population of TY changed more from 1960 to 1975 than from 1975 to 1990.: Yes
Rounded to the nearest million, the total mouse population of TY was 47 million in 1990.: Yes
The total mouse population of TY fell from 1975 to 1990.: No
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
38% (03:33) correct
62%
(03:27)
wrong
based on 1290
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Not Attempted Yet
1. For each of the following statements, select Yes if the statement is accurate based on the information in the passage and tables. Otherwise, select No.
| Yes | No | |
| The total mouse population of TY changed more from 1960 to 1975 than from 1975 to 1990. | ||
| Rounded to the nearest million, the total mouse population of TY was 47 million in 1990. | ||
| The total mouse population of TY fell from 1975 to 1990. |
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Official Answer
The total mouse population of TY changed more from 1960 to 1975 than from 1975 to 1990.: Yes
Rounded to the nearest million, the total mouse population of TY was 47 million in 1990.: Yes
The total mouse population of TY fell from 1975 to 1990.: No
IQ: Yes
JR: No
PS: No
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
64% (02:06) correct
36%
(02:23)
wrong
based on 1020
sessions
History
Date
Time
Result
Not Attempted Yet
2. For each of the following regions, select Yes if the region's Species X population decreased from 1960 to 1975 AND the region's total mouse population exceeded 50 million in 1975, Otherwise, select No,
| Yes | No | |
| IQ | ||
| JR | ||
| PS |
ShowHide Answer
Official Answer
IQ: Yes
JR: No
PS: No
The total mouse population of TY may not have remained roughly constant between 1990 and 2005.
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
54% (01:57) correct
46%
(02:12)
wrong
based on 958
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3. Assume that the Species X population totals of TY remained roughly constant between 1990 and 2005. Which one of the following statements is best supported by the information provided?
| TY most likely does not share a border with any other region in the study. | |
| The total mouse population of TY may not have remained roughly constant between 1990 and 2005. | |
| TY had the largest total mouse population of any region in the study in 2005. | |
| The total mouse population of EW grew more than twice as fast between 1990 and 2005 as the total mouse population of TY did. | |
| TY was the only region in the study in which the Species X population remained relatively steady between 1990 and 2005. |
ShowHide Answer
Official Answer
The total mouse population of TY may not have remained roughly constant between 1990 and 2005.
Attachment:
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12 Feb 2024, 07:48
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Quote:
Could anyone please help understand Q3 and its solution ? Thanks in advance
Frankly speaking, I was initially lost with the words. 3. Assume that the Species X population totals of TY remained roughly constant between 1990 and 2005. Which one of the following statements is best supported by the information provided?
Not the best of the wordings one should find in an official question but the solution would lie in the sentence.
Quote:
Researchers studying long-term changes in regional mouse populations have found that by focusing on the populations of a rare but widespread and easily identifiable species of mouse (Species X), they can make fairly accurate estimations about the total regional mouse populations.
Here, the species X population roughly remainded constant from 1960 to 1990, from 947630 to 968460. But this amount reduce to 2.1% from 3.5% of total mouse poulation. Thus, constant population of species X means increase in overall mouse population in TY.
Correct option - The total mouse population of TY may not have remained roughly constant between 1990 and 2005.
13 Dec 2023, 05:45
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For question 1
In order to find the total mouse in a region , we have to divide the given number of X to the percentage provided in the second table
1. 1960: 947/3.356= 282
1975:144/0.351= 410
1990:968/2.051= 478
we can see difference between 1960 and 1975 is more. so answer is yes
second part: from the last section we got the total population for 1990, which was about 478, therefore this is also YES.
third part: again looking back to the calculation we did, it it obvious that from 1975 to 1990, the poulation increased (from 410 to 478), the answer is No
In order to find the total mouse in a region , we have to divide the given number of X to the percentage provided in the second table
1. 1960: 947/3.356= 282
1975:144/0.351= 410
1990:968/2.051= 478
we can see difference between 1960 and 1975 is more. so answer is yes
second part: from the last section we got the total population for 1990, which was about 478, therefore this is also YES.
third part: again looking back to the calculation we did, it it obvious that from 1975 to 1990, the poulation increased (from 410 to 478), the answer is No
