Question

Topic: Statistics
Q1 Draw a frequency polygon for the following data :
Marks
0-10 10-20 20-30 30-40 40-50 50-60
No. Of
5
8
15
20
10
4
Student
Q2 Draw a histogram for following data :
Marks
0-10 10-20 20-30 30-40 40-50
Frequency 3
10
14
10
3
Q3 Draw histogram for the following data :
Class interval 10-14 15-19 20-24 25-29 30-34
Frequency
4
6
10
8
7
Q4 Find the actual class limits, class limits also the
class marks of the classes :
10-19, 20-29, 30-39, and 40-49
Q5 Given below are the marks obtained by 30
students in examination :
09,18,34,42,48,24,21,35,10,19,43,15,31,20,30,12
41,25,23,03,17,22,16,33,48,45,34,02,37,49.
Taking class intervals 1-10, 11-20 ..... ..., marks a
frequency table for the above distribution.​

Answer 1

Answer:

Mark the class intervals along the X-axis and the number of students along the Y-axis. Draw a histogram for the given data. Now mark the mid points of the upper sides of the consecutive rectangles. The mid points are joined with the help of a ruler. Note that, the first and last edges of the frequency polygon meet at the mid point of the vertical edges of the first and last rectangles.