Question

31. For the month of February, a class teacher of Class IX has collected absentee record from Class
Attendance register for his 45 students. After collecting the data, he analyzed the data and
prepared a report on the absentees. Using this report, he drew the following graph for a
particular of absentees for the month of February:
Number of Students
0
5
25
30
10 15 20
Number of days of absent
Based on the above graph, answer the following questions:
(i) Form the frequency distribution table for the data.
(11) Find the mean number of days, a student was absent.​

Answer 1

Answer:

Step-by-step explanation:

i) Form the frequency distribution table for the data.

             Class interval                      Frequency                                  tally      

0   ---   5                                                       18                                                        

5    ----   10                                                   21                                                          

    10   ---15                                                    27                                                    

15  -----  20                                                    29                                                      

20   ---    25                                                  30                                                        

Mean of the absentees students  = 125 / 5

= 25

So, the mean is 25