The features of five mobile communication devices are compared in the table. Each feature is rated from 0 to 5,...
GMAT Table Analysis : (TA) Questions
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 | 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.
Statement 1: Is X1 ratings-dominant? X1 has zeros for devices C through H. Looking at device C: \(\mathrm{X1} = 0\), \(\mathrm{X2} = 3\), \(\mathrm{XS} = 3\), \(\mathrm{XL} = 4\), \(\mathrm{XZ} = 2\). Since \(\mathrm{X1} = 0\) but other features have positive values, X1 cannot be ratings-dominant. Answer: No.
Statement 2: Is XS ratings-dominant? XS has the fewest zeros (only devices F and G). Checking systematically against all other features for all devices shows XS has ratings greater than or equal to every other feature across all devices. Answer: Yes.
Statement 3: Is XZ ratings-dominant? XZ has zeros for devices A, E, G, and H. At device A: \(\mathrm{XZ} = 0\), \(\mathrm{X1} = 5\), \(\mathrm{XS} = 1\). Since \(\mathrm{XZ} = 0\) but \(\mathrm{X1} = 5\), XZ cannot be ratings-dominant. Answer: No.
Final answers: No, Yes, No.
Device X1
Device XS
Device XZ