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An important part of Maths Chapter 14 Class 9 is grouped and ungrouped data. The details of these two are presented in the following:. Ungrouped data is the data that is in its raw or original form. These observations are hence Byjus Class 7 Maths Chapter 12 not classified into any groups.
In a grouped data, all the observations present are in an organized group as mentioned in Class 9th Maths Chapter The solution for Ch 14 maths Class 9 has the below definitions and more. Read the following to get a glimpse of the content. Frequency: The total number of times a particular data or observation occurs in the data.
Mode: It is the most frequently appearing observation. In the case of a class interval, the class with the highest frequency is the modal class. Median: The value of observation in the middle is called the median. The marks obtained by 40 students in a unit test out of 35 has been recorded as follows:.
Create a grouped frequency distribution table having class size 5 for the data given above such that the first interval is 5 not included. Discuss the major features of the data representation.
Ans: In constructing a grouped frequency distribution table of class size 5, class intervals have to be represented as , , , and so on.
The data represented in the form of a grouped frequency distribution table is as follows Marks X i. Tally Marks. Frequency F i. Image to be added soon. From the above table, it can be observed that no classes overlap and 36 students scored less than 20 in the test.
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