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
Solution
mid value of the class
Frequency polygon is the plot of frequencies vs. the mid values of the classes.
APPEARS IN
RELATED QUESTIONS
A survey conducted by an organisation for the cause of illness and death among the women between the ages 15 - 44 (in years) worldwide, found the following figures (in %):-
S.No. | Causes | Female fatality rate (%) |
1. | Reproductive health conditions | 31.8 |
2. | Neuropsychiatric conditions | 25.4 |
3. | Injuries | 12.4 |
4. | Cardiovascular conditions | 4.3 |
5. | Respiratory conditions | 4.1 |
6. | Other causes | 22.0 |
- Represent the information given above graphically.
- Which condition is the major cause of women’s ill health and death worldwide?
- Try to find out, with the help of your teacher, any two factors which play a major role in the cause in (ii) above being the major cause.
Read the following bar graph and answer the following questions:
(i) What information is given by the bar graph?
(ii) Which state is the largest producer of rice?
(iii) Which state is the largest producer of wheat?
(iv) Which state has total production of rice and wheat as its maximum?
(v) Which state has the total production of wheat and rice minimum?
Read the following bar graph(Fig. 23.15) and answer the following questions:
(i) What information is given by the bar graph?
(ii) What was the production of a student in the year 1980 - 81?
(iii) What is the minimum and maximum productions of cement and corresponding years?
The following table shows the daily production of T. V. sets in an industry for 7 days of a week:
Day | Mon | Tue | Wed | Thurs | Fri | Sat | Sun |
Number of T.V. Sets | 300 | 400 | 150 | 250 | 100 | 350 | 200 |
Represent the above information by a pictograph .
The following table shows the number of Maruti cars sold by five dealers in a particular month:
Dealer: | Saya | Bagga Links | D.D. Motors | Bhasin Motors | Competent |
Cars sold: | 60 | 40 | 20 | 15 | 10 |
Represent the above information by a pictograph.
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.
Construct a frequency polygon for the following distribution:
Class-intervals | 0-4 | 4 - 8 | 8 - 12 | 12 - 16 | 16 - 20 | 20 - 24 |
Frequency | 4 | 7 | 10 | 15 | 11 | 6 |
Draw a histogram to represent the following grouped frequency distribution:
Ages (in years) | Number of teachers |
20 – 24 | 10 |
25 – 29 | 28 |
30 – 34 | 32 |
35 – 39 | 48 |
40 – 44 | 50 |
45 – 49 | 35 |
50 – 54 | 12 |
The lengths of 62 leaves of a plant are measured in millimetres and the data is represented in the following table:
Length (in mm) | Number of leaves |
118 – 126 | 8 |
127 – 135 | 10 |
136 – 144 | 12 |
145 – 153 | 17 |
154 – 162 | 7 |
163 – 171 | 5 |
172 – 180 | 3 |
Draw a histogram to represent 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 a histogram and frequency polygon representing the data above.