Data about marks (out of 50) of 60 students in maths is given below
Using tally marks make a frequency table with class interval 0-10
10-20 and so on.
21.10,30,22,33,5,37.12.25.42.15.39.26,32.18.27.28.19,29,35.31.24.36,1,8,20,38.22,44,16,24,10.27.39.28,49,29,32,23.31.21.34.22.33.36.34,36,33.47,48,50,39.20.7.16,36,45,47 30.22.17
Answers
Step-by-step explanation:
Note: If we prepare frequency distribution table for each observation, then the table would be too long. So for our convenience, we make groups of observations like 0 – 9, 10 – 19, and so on. We obtain a frequency distribution of number of observations coming under each group. In this way, we prepare a frequency distribution table for the above data as below:]
groups tally marks frequency
0 – 9 III 03
10 – 19 IIII IIII 10
20 – 29 IIII IIII IIII I 16
30 – 39 IIII IIII IIII 15
40 – 49 IIII I 06
50 – 59 0
Total 50 50
In the above table, marks are grouped into 0 – 9, 10 – 19, and like. No scores overlap in any group. Each of these groups is called a class interval or a class. This method of grouping data is called inclusive method.
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