Mathematics
The length of 40 leaves of a plant are measured correct to one millimetre, and the obtained data is represented in the following table :
| Length (in mm) | Number of leaves |
|---|---|
| 118 - 126 | 3 |
| 127 - 135 | 5 |
| 136 - 144 | 9 |
| 145 - 153 | 12 |
| 154 - 162 | 5 |
| 163 - 171 | 4 |
| 172 - 180 | 2 |
(i) Draw a histogram to represent the given data. [Hint: First make the class intervals continuous]
(ii) Is there any other suitable graphical representation for the same data?
(iii) Is it correct to conclude that the maximum number of leaves are 153 mm long? Why?
Related Questions
The following data on the number of girls (to the nearest ten) per thousand boys in different sections of Indian society is given below.
Section Number of girls per thousand boys Scheduled Caste (SC) 940 Scheduled Tribe (ST) 970 Non SC/ST 920 Backward districts 950 Non-backward districts 920 Rural 930 Urban 910 (i) Represent the information above by a bar graph.
(ii) In the classroom discuss what conclusions can be arrived at from the graph.
Given below are the seats won by different political parties in the polling outcome of a state assembly elections:
Political Party Seats Won A 75 B 55 C 37 D 29 E 10 F 37 (i) Draw a bar graph to represent the polling results.
(ii) Which political party won the maximum number of seats?
The following table gives the life times of 400 neon lamps:
Life time (in hours) Number of lamps 300 - 400 14 400 - 500 56 500 - 600 60 600 - 700 86 700 - 800 74 800 - 900 62 900 - 1000 48 (i) Represent the given information with the help of a histogram.
(ii) How many lamps have a life time of more than 700 hours?
The following table gives the distribution of students of two sections according to the marks obtained by them:
Section A
Marks Frequency 0 - 10 3 10 - 20 9 20 - 30 17 30 - 40 12 40 - 50 9 Section B
Marks Frequency 0 - 10 5 10 - 20 19 20 - 30 15 30 - 40 10 40 - 50 1 Represent the marks of the students of both the sections on the same graph by two frequency polygons. From the two polygons compare the performance of the two sections.