The table above shows the distribution of test scores for a

AAPL wrote:GMAT Prep

SCORE INTERVAL----------------NUMBER OF SCORES

50-59-------------------------- 2
60-69--------------------------10
70-79--------------------------16
80-89--------------------------27
90-99--------------------------18

The table above shows the distribution of test scores for a group of management trainees. Which score interval contains the median of the 73 scores?

A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. It cannot be determined from the information given.

OA C

See the self-explanatory image.



The correct answer: C

Hope this helps!

-Jay
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AAPL wrote:GMAT Prep

SCORE INTERVAL----------------NUMBER OF SCORES

50-59-------------------------- 2
60-69--------------------------10
70-79--------------------------16
80-89--------------------------27
90-99--------------------------18

The table above shows the distribution of test scores for a group of management trainees. Which score interval contains the median of the 73 scores?

A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. It cannot be determined from the information given.

OA C

Since there are 73 scores, the median score will be at the (73+1)/2 = 74/2 = 37th position.

Therefore, we need to find the interval that contains the score at the 37th position. From the table, we see that the interval 50–59 contains scores in the 1st and 2nd positions, the interval 60–69 contains scores in the 3rd to 12th positions, the interval 70–79 contains scores in the 13th to 28th positions, and the interval 80–89 contains scores in the 29th to 55th positions.

Thus, the interval 80–89 must contain the median score, i.e., the score at the 37th position.

Answer: C

AAPL wrote:GMAT Prep

SCORE INTERVAL----------------NUMBER OF SCORES

50-59-------------------------- 2
60-69--------------------------10
70-79--------------------------16
80-89--------------------------27
90-99--------------------------18

The table above shows the distribution of test scores for a group of management trainees. Which score interval contains the median of the 73 scores?

A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. It cannot be determined from the information given.

OA C

Since we have an ODD number of values, the median will be the MIDDLEMOST value. In other words, if we arrange all 73 values in ASCENDING order, the median will be the 37th value (i.e., 36 values are below and 36 values are above).

The table says the first 2 scores in the 50-59 range. So, the 1st and 2nd values will be in the 50-59 range.
The table says the next 10 scores in the 60-69 range. So, 3rd to 12th values will be in the 60-69 range.
The table says the next 16 scores in the 70-79 range. So, the 13th to 28th values will be in the 70-79 range.
The table says the next 27 scores in the 80-89 range. So, the 29th to 45th values will be in the 80-89 range.

As we can see, the 37th value must be in the 80-89 range.

Answer: C

Cheers,
Brent