Question

Construct a grouped frequency table with class intervals 0-5,5-10 and so on for the following marks obtained in Maths (out of 50) by a group of 35 students in an examination:
0,5,6,7,10,12,14,15,20,22,25,26,27,8,11,17,3,6,9,17,19,21,22,29,31,35,37,40,42,45,49
,4,50,16,20
(i) What is the range of the data?
(ii) Which group contains the maximum number of students?

Answer 1

Answer:

Answer

Given that marks obtained by a group of 30 students in an examination

0,5,7,10,12,15,20,22,25,27,8,11,17,3,6,9,17,19,21,29,31,35,37,40,42,45,49,4,50,16.

We can prepare frequency table with class - intervals (0-5) 5 not included

Class intervals Frequency

0 - 5 3

5 - 10 5

10 - 15 3

15 - 20 5

20 - 25 3

25 - 30 3

30 - 35 1

35 - 40 2

40 - 45 2

45 - 50 2

50 - 55 1

Total 30