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01 Jul 2020, 22:04
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Device X1: No
Device XS: Yes
Device XZ: No
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
61% (02:10) correct
39%
(02:05)
wrong
based on 1377
sessions
History
Date
Time
Result
Not Attempted Yet
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.
(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
| Device | |||||
| Features | X1 | X2 | XS | XL | XZ |
|---|---|---|---|---|---|
| A | 5 | 0 | 1 | 0 | 0 |
| B | 2 | 0 | 2 | 5 | 1 |
| C | 0 | 3 | 3 | 4 | 2 |
| D | 0 | 3 | 5 | 0 | 2 |
| E | 0 | 0 | 4 | 4 | 0 |
| F | 0 | 0 | 0 | 0 | 1 |
| G | 0 | 0 | 0 | 3 | 0 |
| H | 0 | 2 | 2 | 1 | 0 |
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 |
ShowHide Answer
Official Answer
Device X1: No
Device XS: Yes
Device XZ: No
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.
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.
General Discussion
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
Posted from my mobile device
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
Posted from my mobile device
