If there are n observations, then,
If n is odd then let m = (n+1)/2. The median is the mth value in the ordered set of observations.
If n is even then let m = n/2. The median is the average of the mth and (m+1)th values in the ordered set of observations.
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*Ungrouped Data*Mode of ungrouped data:An observation occurring most frequently in the data is called mode of the data. It is denoted by Z.For Example:Find the median of the following observations4,6,8,6,7,8,8Sol:In the given data, the observation 8 occurs maximumnumber of times (3)\ Mode (Z) = 8
D=E1+((dN/10)-Cf)(I)/F The formula of deciles is different for grouped and ungrouped data.
The mode of ungrouped data is the value that appears the most often. The mode may not be a number - for example if looking at the favourite colour of a set of people.
Groued or ungrouped data all used to conclude something,but that conclusion is not 100% accurate,Whatever we use those just to live in this world,so dont bother about it . Groued or ungrouped data all used to conclude something,but that conclusion is not 100% accurate,Whatever we use those just to live in this world,so dont bother about it .
The average deviation is always 0.