Q.

In an arranged series of an even number of 2n terms the median is


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a

n th   and (n+1) tn   observations. 

b

n+ 2 th   and (n+1) tn   observations.

c

n th   and (n+1) 2 tn   observations.

d

None of these 

answer is A.

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Detailed Solution

Given an arranged series of 2n terms.
Median divides the data into upper half and lower half observations.
Here, the number of observations is 2n, which is even.
The median is the mean of n th   and (n+1) th   observations is
2n 2 =n and  2n 2 +1=n+1  
Therefore, median is the mean of 2n 2  th and  2n 2 +1  th    observations.
Thus, in an arranged series of an even number of 2n terms the median is the mean of n th   and (n+1) th   observations.
Therefore, option (1) is correct.
 
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In an arranged series of an even number of 2n terms the median is