Mathematics
If in a grouped frequency distribution, the classes are 20 - 30, 30 - 40, 40 - 50, …, then the observation 40 is included in the class :
30 - 40
40 - 50
50 - 60
20 - 30
Related Questions
Construct a frequency table from the following data :
Age (in years) Number of Students Less than 10 6 Less than 20 14 Less than 30 30 Less than 40 52 Less than 50 65 Less than 60 70 Convert the following frequency distribution to exclusive form :
Class Interval Frequency 30 – 34 7 35 – 39 9 40 – 44 13 45 – 49 6 50 – 54 3 55 – 59 10 Use this table to find :
(i) The true class-limits of the fourth class-interval.
(ii) The class-boundaries of the fifth class-interval.
(iii) The class-mark of the third class-interval.
(iv) The class-size of the sixth class-interval.
If in a grouped frequency distribution, the class intervals are 20 - 29, 30 - 39, 40 - 49, …., then the observation 29.4 is included in the class :
20 - 29
30 - 39
40 - 49
29 - 30
The classes of a frequency distribution are 30 -34, 35 - 39, …, 50 - 54. The lower boundary of the class 35 - 39 is :
30.5
35
34.5
39