NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 13
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Exercise 14.4
Q.1. The following are the marks (out of 100) of 60 students in mathematics.
Construct a grouped frequency distribution table with width of each class starting from .
Answer:
Class | ||||||||||
Frequency | 1 | 2 | 5 | 6 | 3 | 4 | 3 | 2 | 5 | 4 |
Q.2. Refer to Q1 above. Construct a grouped frequency distribution table with width 10 of each class, in such a way that one of the classes is 10 - 20 (20 not included).
Answer:
Class intervals | Frequency |
4 | |
7 | |
5 | |
10 | |
5 | |
8 | |
5 | |
8 | |
5 | |
3 |
Q.3. Draw a histogram of the following distribution:
Heights (in cm) | Number of students |
7 | |
8 | |
14 | |
10 | |
6 | |
5 |
Q.4. Draw a histogram to represent the following grouped frequency distribution:
Ages (in years) | Number of teachers |
10 | |
28 | |
32 | |
48 | |
50 | |
35 | |
12 |