 Hello and welcome to the session. In this session we discussed the following question which says, define the terms tabulation of data and frequency of an observation. Let's see the solution now. First we will define tabulation of data, arranging the data in a systematic form in the form of a table is called tabulation of data. Then next we define frequency of an observation. The number of times the observation occurs is called its frequency, that is, is called the frequency of an observation. So this completes the session. Hope you have understood the solution of this question.