Find median of the given observation: 25,14,28,30,25,15,32.
A
28
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B
30
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C
25
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D
31
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Solution
The correct option is C25 Median is the middle
most value of a series. So when the series has odd number of elements then
median can be calculated easily but when the series has even number of elements
then the series has two middle values, so median is calculated either by taking
out the average of both the value.
The series is first arranged into either ascending or descending order. The formula to calculate median = (N+1) /2 th term of the series where N is the number of observation in the series.
The given series is first arranged into ascending; 14,15,25,25,28,30,32.
N= 7
median= (7+1)/2 th term = 8/2 th term = 4 th term = 25.