Worksheet for chapter: Statistics is presented below. The worksheets are provided for practice and self evaluation of students of class 9. Solutions are provided at the end of the page.
(1) The weights (kg) of the students of a class are as follows –
40 45 42 42 50 45 35 55 52 42 40 35
35 56 40 41 50 47 41 42 45 39 40 42
(i) Construct a frequency distribution table.
(ii) Which weights is find maximum among students?
(2) The height (cm) 40 students are as follows-
140 145 150 160 145 140 153 154 144 147
162 170 169 144 156 165 166 172 143 135
133 138 172 154 149 148 139 147 150 168
164 146 156 153 159 173 139 145 150 155
(i)Represent these data in grouped frequency distribution table.
(ii) Give your conclusion from this table.
(3) Given below are the numbers of books on different subjects in the library.
| Subjects | Mathematics | Physics | Chemistry | History | Others |
| Number of Books | 400 | 250 | 300 | 300 | 100 |
(i) Draw a bar graph from the above data.
(ii) Which subject has maximum number of books?
(4) Construct a histogram representing data below –
| Salary (Rs) | Number of Persons |
| 1000 – 5000 | 50 |
| 5000 – 10000 | 45 |
| 10000 – 15000 | 30 |
| 15000 – 20000 | 20 |
| 20000 – 25000 | 10 |
(5) There are 30 members in the gym. The data of numbers of members according to their weights are given below –
| Weights (kg) | Number of Members |
| 46 – 55 | 2 |
| 56 – 65 | 4 |
| 66 – 75 | 5 |
| 76 – 85 | 8 |
| 86 – 95 | 6 |
| 96- 105 | 5 |
| Total 30 | |
Construct a frequency polygon with given data.
(6) The number of rose flowers in a garden for 10 years are given below –
100, 150, 125, 175, 173, 145, 110, 150, 152, 134
Find the mean and median of the data.
(7)Find the mode and median of the given data-
34, 45, 75, 10, 34, 10, 75, 75, 45
(8) Find the mean of the given table –
| Salary (Rs) | Number of persons |
| 4000 | 15 |
| 10000 | 10 |
| 12000 | 8 |
| 15000 | 2 |
(9) Fill in the blanks-
(i) Facts of figures, collected with a definite purpose, are called ______.
(ii) _____ is the area of study dealing with the presentation, analysis and interpretation of data.
(10) Find out primary and secondary data from the given example below –
Favorite TV programme among the kids in your neighbourhood, population of the country, number of tigers in a wildlife sanctuary, rain in our state, height of students of your class, Patients in hospital for different diseases.
Helping Topics