Mathematics
The marks of 24 candidates in the subject mathematics are given below :
45 48 15 23 30 35 40 11
29 0 3 12 48 50 18 30
15 30 11 42 23 2 3 44
The maximum marks are 50. Make a frequency distribution taking class intervals 0-10, 10-20, …………… .
Statistics
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Answer
The frequency table for the given distribution is :
| Marks | Tally marks | Frequency |
|---|---|---|
| 0 - 10 | IIII | 4 |
| 10 - 20 | 6 | |
| 20 - 30 | 5 | |
| 30 - 40 | III | 3 |
| 40 - 50 | 6 |
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Related Questions
State, which of the following variables are continuous and which are discrete :
(a) number of children in your class.
(b) distance travelled by a car.
(c) sizes of shoes.
(d) time.
(e) number of patients in a hospital.
Given below are the marks obtained by 30 students in an examination :
08 17 33 41 47 23 20 34
09 18 42 14 30 19 29 11
36 48 40 24 22 02 16 21
15 32 47 44 33 01
Taking class intervals 1-10, 11-20, ……………, 41-50; make a frequency table for the above distribution.
Fill in the blanks :
(a) A quantity which can vary from one individual to another is called a ……………
(b) Sizes of shoes are …………… variables.
(c) Daily temperature is …………… variable.
(d) The range of the data 7, 13, 6, 25, 18, 20, 16 is ……………
Range of the data is the difference between the highest and the lowest values.
(e) In the class interval 35-46; the lower limit is …………… and upper limit is ……………
(f) The class mark of class interval 22 - 29 is ……………
Find the actual lower class limits, upper class limits and the mid-values of the classes :
10-19, 20-29, 30-39 and 40-49.