English

A Frequency Polygon is Constructed by Plotting Frequency of the Class Interval and the - Mathematics

Advertisements
Advertisements

Question

A frequency polygon is constructed by plotting frequency of the class interval and the

Options

  • upper limit of the class

  •  lower limit of the class

  • mid value of the class

  •  any values of the class

MCQ
Advertisements

Solution

mid value of the class
Frequency polygon is the plot of frequencies vs. the mid values of the classes.

shaalaa.com
  Is there an error in this question or solution?
Chapter 23: Graphical Representation of Statistical Data - Exercise 23.4 [Page 42]

APPEARS IN

RD Sharma Mathematics [English] Class 9
Chapter 23 Graphical Representation of Statistical Data
Exercise 23.4 | Q 3 | Page 42

RELATED QUESTIONS

Read the bar graph given in Fig. 23.17 and answer the following questions:
(i) What information is given by the bar graph?
(ii) What was the crop-production of rice in 1970 - 71?
(iii) What is the difference between the maximum and minimum production of rice?

 


Read the bar graph given in Fig. 23.22 and answer the following questions:

(i) What information is given by the bar graph?
(ii) Which Doordarshan centre covers maximum area? Also tell the covered area.
(iii) What is the difference between the areas covered by the centres at delhi and Bombay?
(iv) Which Doordarshan centres are in U.P State? What are the areas covered by them?


Explain the reading and interpretation of bar graphs.


The following table gives the route length (in thousand kilometres) of the Indian Railways in some of the years:

Year 1960-61 1970-71 1980-81 1990-91 2000-2001
Route length
(in thousand km)
56 60 61 74 98

Represent the above data with the help of a bar graph.


Draw, in the same diagram, a histogram and a frequency polygon to represent the following data which shows the monthly cost of living index of a city in a period of 2 years:

Cost of living
index:
440-460 460-480 480-500 500-520 520-540 540-560 560-580 580-600
No. of months: 2 4 3 5 3 2 1 4

In a histogram the area of each rectangle is proportional to


In a histogram the class intervals or the group are taken along


The daily wages in a factory are distributed as follows:

Daily wages (in Rs.)

125 - 175

175 - 225

225 - 275

275 - 325

325 - 375

Number of workers

4

20

22

10

6

Draw a frequency polygon for this distribution.


Following table shows a frequency distribution for the speed of cars passing through at a particular spot on a high way:

Class interval (km/h) Frequency
30 – 40 3
40 – 50 6
50 – 60 25
60 – 70 65
70 – 80 50
80 – 90 28
90 – 100 14

Draw a histogram and frequency polygon representing the data above.


Following table shows a frequency distribution for the speed of cars passing through at a particular spot on a high way:

Class interval (km/h) Frequency
30 – 40 3
40 – 50 6
50 – 60 25
60 – 70 65
70 – 80 50
80 – 90 28
90 – 100 14

Draw the frequency polygon representing the above data without drawing the histogram.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×