deya wrote:
Bunuel wrote:
rpamecha wrote:
SCORE INTERVAL----------------NUMBER OF SCORES
50-59-------------------------- 2
60-69--------------------------10
70-79--------------------------16
80-89--------------------------27
90-99--------------------------18
The table shown above has distribution of test scores. Which score interval contains the median of the 73 scores?
A. 60-69
B. 70-79
C. 80-89
D. 90-99
E. Cannot be determined.
Please explain your answer.
Median of 73 data points is the middle term - 37rd score. First 3 score ranges cover total of 28 scores (2+10+16), 37rd will be in fourth range (it covers scores from 80 to 89).
Answer: C.
Dear Bunnel,
As I know, the arrangement either in ascending or in descending order is a must in case of finding median. So, it would be 2+10+16+18+27. By adding 2+10+16 we get 28. Then, we need to add 18 and we get 46. So, 37 comes within 46 and the range should be 90-99 as it is the range for 18. Kindly tell me where I missed.
I think you misinterpreted the question. We have that there are:
2 scores from 50-59, say both are 55;
10 scores from 60-69, say all are 65;
16 scores from 70-79, say all are 75;
27 scores from 80-89, say all are 85;
18 scores from 90-99, say all are 95.
55, 55, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 85, 85, 85, 85, 85, 85, 85, 85,
85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95.
Similar question to practice:
the-table-above-shows-the-distribution-of-test-scores-for-a-93978.htmlHope it helps.
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