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Bunuel
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Bunuel
The table lists data on each of 7 hiking trails managed by a regional park authority. For each trail, the terrain type refers to the primary surface of the trail, the average hike time is the mean (arithmetic mean) number of minutes taken by hikers to complete it, the satisfaction score is the average (arithmetic mean) rating out of 100 reported by visitors, and the usage rank is the trail’s ranking based on total visitors, where a smaller number denotes higher usage.

TrailTerrain typeAverage hike time (min)Satisfaction scoreUsage rank
Aspen Loopforest92833
Granite Pathrocky105912
Riverwalkgravel88726
Summit Ridgerocky117951
Willow Creekforest84794
Sandy Dunessand78697
Canyon Bendgravel95815

For each of the following statements about this data, select Yes if the statement can be inferred from the given information. Otherwise, select No.
Let’s answer the questions one by one :

Question 1 : Trails with rocky terrain have, on average, higher satisfaction scores than those with forest terrain.

Trails that have rocky terrain are as follows with their satisfaction scores.

Granite Path ( Satisfaction score = 91 ) , Summit Ridge (Satisfaction score = 95).

Average should be roughly between 91 and 95. Exactly 93.

Trails that have forest terrain are as follows with their satisfaction scores.

Willow creek ( satisfaction score : 79) , Aspen Loop ( Satisfaction score : 83).

The average score is roughly between 79 and 83. Exactly 81.

Clearly, Rocky terrain average 93 is GREATER than the Forest terrain average 81. Hence, YES.


Question 2: No gravel trail ranks among the three most-used trails.

The three most used trails are : 1) Summit ridge ( rocky ) , 2) Granite path ( rocky) , 3) Aspen loop ( forest).

Thus, it’s clear that gravel trail don’t occupy the three most used ranks. Hence, YES.


Question 3: Among the trails with above-average hike times, the one with the lowest satisfaction score is also the least used overall.

First let’s find the average hike time for all the trails mentioned. Average hike time is between 92 and 95, as the values are not spread out.

Exact average hike time = (78+84+88+92+95+105+117)/7 is approx 94.5

Trails above the average are given with their satisfaction score, usage ranks :

Canyon Bend (SS : 81, UR : 5)

Granite path ( SS: 91, UR: 2)

Summit Ridge (SS : 95, UR 1).

The one with the lowest satisfaction score is Canyon Bend (81), with a usage rank of 5 - which is below the usage rank of 7. Hence, NO.
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dont you think we should be looking from the ones "among the above average hike time". i spotted that and it immediately struck me that GMAT often tricks us with this and hence i only looked "among the above average hike time".
AdarshSambare
I. Arrange Satisfaction score Tab.
Clearly Rocky terrain on average have higher score then forest terrain, in fact they have the highest score

Answer: Yes


II. Arrange Usage rank Tab.

Note: Given in question Low Usage rank means high number of visitor
Gravel lies in bottom 3

Answer: Yes


III. Tricky one if you don't read it slowly.
Above-average hike times, Arrange Average hike time Tab.
The lowest satisfaction score is either 5 or 3.
but overall least used rank is Sandy Dunes with rank 7

Answer: No
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Hi HarshG7,
Yes you are correct, we should be looking for "above average hike time".
But for that you need to calculate above average hike time right?
So, adding all the 7 values of Average hike time (min) and dividing it by 7.
You can use calculator and add
=> 78+84+88+92+95+105+117
=> 659/7
=> 94.5/ 95


So the Trails above the average are given with their satisfaction score, usage ranks :
Canyon Bend (SS : 81, UR : 5)

Granite path ( SS: 91, UR: 2)

Summit Ridge (SS : 95, UR 1)

The one with the lowest satisfaction score is Canyon Bend (81), with a usage rank of 5 but we have Sandy Dunes with worst Usage rank of 7
So the answer is No,

I hope the explanation was helpful

HarshG7
dont you think we should be looking from the ones "among the above average hike time". i spotted that and it immediately struck me that GMAT often tricks us with this and hence i only looked "among the above average hike time".

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