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Question
A football player scored the following number of goals in the 10 matches:
1, 3, 2, 5, 8, 6, 1, 4, 7, 9
Since the number of matches is 10 (an even number), therefore, the median
= `(5^("th") "observation" + 6^("th") "observation")/2`
= `(8 + 6)/2` = 7
Is it the correct answer and why?
Solution
No. It is not the correct answer, because the data have to be arranged in ascending or descending order before finding the median.
Arranging the data in ascending order 1, 1, 2, 3, 4, 5, 6, 7, 8, 9.
Here, number of observations is 10, which is even.
So, median = `((n/2)^("th") "observation" + (n/2 + 1)^("th") "observation")/2`
= `((10/2)^("th") "observation" + (10/2 + 1)^("th") "observation")/2`
= `(5^("th") "observation" + 6^("th") "observation")/2`
= `(4 + 5)/2`
= `9/2`
= 4.5
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