# NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 13

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 .

 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).

 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

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