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The features of five mobile communication devices are compared in the

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Sajjad1994
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The features of five mobile communication devices are compared in the [#permalink] New post   01 Jul 2020, 22:04
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The features of five mobile communication devices are compared in the table. Each feature is rated from 0 to 5, with greater ratings indicating greater quality. A device (P) is said to be ratings-dominant over another device (Q) if P matches or exceeds the ratings of Q for every single feature in the table but Q does not match all of the ratings of P.
Device
FeaturesX1X2XSXLXZ
A50100
B20251
C03342
D03502
E00440
F00001
G00030
H02210
(Sort ↕ the table by clicking on the headers)

For each of the following devices, select Yes if the device is ratings-dominant over any of the other devices in the table. Otherwise, select No. 

ID 001228­
Yes No
Device X1
Device XS
Device XZ
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Device X1: No Device XS: Yes Device XZ: No
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Sajjad1994
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   05 Apr 2021, 07:56
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Official Explanation

RO1

To be ratings-dominant over one of the other devices, Device X1 must match or exceed all the ratings of the other device in every other category. In other words, it could not have a lower rating than the other device in any category. By sorting the table on X1, it is clear that Device X1 has a zero rating for every feature except A and B, and no other device has zero ratings in all those categories. Thus, Device X1 cannot be ratings-dominant over any of the other devices in the table.

The correct answer is No.

RO2

Sorting the table by XS shows that every rating for Device XS matches or exceeds the rating for Device X2. Moreover, the ratings for Features A, B, D, and E for Device XS exceed those of Device X2. Therefore, Device XS is ratings-dominant over Device X2.

The correct answer is Yes.

RO3

Sorting the table by XZ shows that Device XZ’s ratings for both Features C and D exceed those of Device X1, but of no other device. However, Device X1 has higher ratings than Device XZ for Features A and B. Thus, Device XZ cannot be ratings-dominant over any of the other devices.

The correct answer is No.
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   01 Jul 2020, 22:17
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1)No,since if we see and compare individual feature based rating for X1 with the rating of other devices than we see that for one or more features the rating of X1 is less than that of others,for example
Rating of X1 (Feature D)< Rating of XZ(Feature D) & Rating of X1(Feature H)<Rating of other devices (Feature H)

2)Yes, Device XS is ratings dominant when you compare it's ratings with those of X2 since the ratings of XS are >= those of X2,and in only two ratings the value matches ,this satisfying the criteria.

3)No,Device XZ is not ratings dominant since one or the rating category it has less rating than that of the other devices

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Re: The features of five mobile communication devices are compared in the [#permalink] New post   02 Jul 2020, 10:53
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1. Device X1 - If we compare the features of X1 with those of X2, XS, or XZ, we can see that for each of the device, one or the other feature is greater than that of X1.
Thus answer is No.

2. Device XS - On comparing we can see that device XS is better in features than X2. As all the features of XS are >= X2 and X2's features are less than those of XS.

Answer Is Yes.

3. Device XZ - The features of XZ are not better than any of the devices, as it lags behind in one or the other category when compared to other devices.

Answer Is No.
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   02 Jul 2020, 11:27
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Rating of devices in descending order:
A. X1 > XS > XZ = X2 = XL
B. XL > XS = X1 > XZ > X2
C. XL > XS = X2 > XZ > X1
D. XS > X2 > XZ > XL = X1
E. XL = XS > X1 = XZ = X2
F. XZ > XS = X1 = XL = X2
G. XL > XS = X1 = XZ = X2
H. X2 = XS > XL > XZ = X1

Devices are dominant when its ahead of any other model constantly.

Device X1: Its ranked at last in few of the features. So it can't be the dominant one. (FALSE)

Device XS: In above table its always ranked ahead of model X2. Hence Device XS is dominant. (TRUE)

Device XZ: Even though Its not ranked as last. But it's competitive devices are in both in dominant phase for the particular feature or succeeding the model XZ. So it can't be the dominant one. (FALSE)

So, X1 : No, XS : Yes, XZ : No.

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Re: The features of five mobile communication devices are compared in the [#permalink] New post   06 Jul 2020, 10:03
1. No, The only feature dominant in X1 is of A, other than that the ratings for other features are lower than others.
2. Yes, The ratings for XS dominates XZ and X2 for most of the features.
3. No, XZ has the lowest ratings when compared to other devices.
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   06 Jan 2022, 17:12
Device XS is lower in the rating in B and E against device XL. why is the answer still yes?

Sajjad1994 wrote:
Official Explanation

RO1

To be ratings-dominant over one of the other devices, Device X1 must match or exceed all the ratings of the other device in every other category. In other words, it could not have a lower rating than the other device in any category. By sorting the table on X1, it is clear that Device X1 has a zero rating for every feature except A and B, and no other device has zero ratings in all those categories. Thus, Device X1 cannot be ratings-dominant over any of the other devices in the table.

The correct answer is No.

RO2

Sorting the table by XS shows that every rating for Device XS matches or exceeds the rating for Device X2. Moreover, the ratings for Features A, B, D, and E for Device XS exceed those of Device X2. Therefore, Device XS is ratings-dominant over Device X2.

The correct answer is Yes.

RO3

Sorting the table by XZ shows that Device XZ’s ratings for both Features C and D exceed those of Device X1, but of no other device. However, Device X1 has higher ratings than Device XZ for Features A and B. Thus, Device XZ cannot be ratings-dominant over any of the other devices.

The correct answer is No.
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   12 Oct 2022, 09:32
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I'm not able to understand why RO2 is true. In the Official Explanation, XS is compared only with X2. However, comparing XS in particular with XL, XL has the highest ratings in three features (B, C and G) among all devices whereas XS has highest rating in only one feature (D) and has same highest rating as XL for feature E. For features A, F other devices X1 and XZ respectively have the highest ratings. Then how XS is rating-dominant?
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   09 Dec 2022, 00:01
sushant2012 wrote:
I'm not able to understand why RO2 is true. In the Official Explanation, XS is compared only with X2. However, comparing XS in particular with XL, XL has the highest ratings in three features (B, C and G) among all devices whereas XS has highest rating in only one feature (D) and has same highest rating as XL for feature E. For features A, F other devices X1 and XZ respectively have the highest ratings. Then how XS is rating-dominant?


Dear sushant2012
I have similar doubt; the answer, plausibly, is the wording of the question:
Quote:
For each of the following devices, select Yes if the device is ratings-dominant over any of the other devices in the table. Otherwise, select No.


"any of the other devices" does not equal to any devices or all devices.
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   24 Jun 2023, 04:22
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Can anyone please help shed a light on this? I still don't understand why in 2) Yes, the device XS ONLY compared to X2, why it not compared to X1?
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   24 Jun 2023, 23:57
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huongdo122 wrote:
Can anyone please help shed a light on this? I still don't understand why in 2) Yes, the device XS ONLY compared to X2, why it not compared to X1?


You may need to read the complete thread as the answer to your question is posted at least twice.

Hint: We have to compare the features of XS with X2.
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   05 Apr 2024, 07:32
BLTN wrote:
sushant2012 wrote:
I'm not able to understand why RO2 is true. In the Official Explanation, XS is compared only with X2. However, comparing XS in particular with XL, XL has the highest ratings in three features (B, C and G) among all devices whereas XS has highest rating in only one feature (D) and has same highest rating as XL for feature E. For features A, F other devices X1 and XZ respectively have the highest ratings. Then how XS is rating-dominant?

Dear sushant2012
I have similar doubt; the answer, plausibly, is the wording of the question:
Quote:
For each of the following devices, select Yes if the device is ratings-dominant over any of the other devices in the table. Otherwise, select No.

"any of the other devices" does not equal to any devices or all devices.

­so "any of the other" means "at least one of the other"? Can someone who is native speaker answer that?
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Re: The features of five mobile communication devices are compared in the [#permalink] New post   06 Apr 2024, 11:04
I really didn't understand why the second question is considered true, while the question clearly states that the Device must be compared to all other devices!!
While Device XS is less in the rankings of some features that Device XL!!
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Re: The features of five mobile communication devices are compared in the [#permalink]
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