 Hi and welcome to the session. Let us just ask the following question. The question says a company manufactures power batteries of a particular high. The lives in years of 40 such batteries were recorded as follows. This is the data given to us. Construct a group frequency distribution table for this data using class intervals of size 0.5 starting from the interval 2 to 2.5. Let's now begin with the solution. We have to construct frequency distribution table of the given data. Let's make a table now. We have made two columns, one for life of batteries, another for frequency. The question we are given that we have to take the first class interval as 2 to 2.5. Now look at the data. Maximum value in this data is 4.6 and it is also given in the question that class intervals are of the size 0.5. So remaining class intervals are 2.5 to 3.0, 3.0 to 3.5, 3.5 to 4.0, 4.0 to 4.5, 4.5 to 5.0. Remember that 2.5 is not included in this interval. It is included in the next interval. Similarly, 3.0 is not included in this interval. It is included in the next interval. So giving this in mind, we will now write the frequency of all the intervals. Find the number of values which are covered within the interval 2.0 to 2.5. Now 2.3 and 2.2 are included in this interval. So frequency of the interval 2 to 2.5 is 2. Now again look at the data. Find the number of values which are included in the interval 2.5 to 3.0. Values which are included in the interval 2.5 to 3.0 are 2.6, 2.5, 2.9, 2.8, 2.6, 2.9. So there are six values which are covered in this interval. For in the same pattern, we have found out the frequencies of other intervals. On adding all these frequencies, we get 40. So this is our required frequency distribution table. So this completes the session. Bye and take care.