Group data is generally seen as 5-1010-1515-20 and the series goes on further we also have the frequency given of this group data in accordance to which they take place in the series. Where L Lower limit Mode of modal class. Now we have to simply calculate the mid value of the grouped data by dividing the sum of group data for the each sequence of the numbers.
The first step in grouping data is deciding how large of a class interval to use.
Displaystyle bar x frac sum fx sum f frac 405 202025 The mean for the grouped data in example 4 above can be calculated as follows. Or there may be more than one mode. Group data is generally seen as 5-1010-1515-20 and the series goes on further we also have the frequency given of this group data in accordance to which they take place in the series. A set of numbers consists of three 4s five 5s six 6s eight 8s and seven 10s.