Mathematics
The weekly wages (in rupees) of 30 workers in a factory given below :
630, 635, 690, 610, 635, 636, 639, 645, 698, 690, 620, 660, 632, 633, 655, 645, 604, 608, 612, 640, 685, 635, 636, 678, 640, 668, 690, 606, 640, 690
Represent the data in the form of a frequency distribution with class size 10.
Answer
Minimum age = 604
Maximum age = 698
Given class size = 10
so we can take the class intervals as
600 - 610, 610 - 620, 620 - 630, 630 - 640, 640 - 650, 650 - 660, 660 - 670, 670 - 680, 680 - 690, 690 - 700
Frequency distribution table :
| Class interval | Tally-Marks | Frequency |
|---|---|---|
| 600 – 610 | III | 3 |
| 610 – 620 | II | 2 |
| 620 – 630 | I | 1 |
| 630 – 640 | 9 | |
| 640 – 650 | 5 | |
| 650 – 660 | I | 1 |
| 660 – 670 | II | 2 |
| 670 – 680 | I | 1 |
| 680 – 690 | I | 1 |
| 690 – 700 | 5 | |
| Total | 30 |
Related Questions
The marks obtained by 40 students of a class in an examination are given below. Present the data in the form of a frequency distribution using equal class-size, one such class being 10 - 15(15 not included).
3, 20, 13, 1, 21, 13, 3, 23, 16, 13, 18, 12, 5, 12, 5, 24, 9, 2, 7, 18, 20, 3, 10, 12, 7, 18, 2, 5, 7, 10, 16, 8, 16, 17, 8, 23, 21, 6, 23, 15
Construct a frequency table for the following ages (in years) of 30 students using equal class-intervals, one of them being 9-12, where 12 is not included.
18, 12, 7, 6, 11, 15, 21, 9, 8, 13, 15, 17, 22, 19, 14, 21, 23, 8, 12, 17, 15, 6, 18, 23, 22, 16, 9, 21, 11, 16
The weights in grams of 50 apples picked at random from a consignment are as follows :
131, 113, 82, 75, 204, 81, 84, 118, 104, 110, 80, 107, 111, 141, 136, 123, 90, 78, 90, 115, 110, 98, 106, 99, 107, 84, 76, 186, 82, 100, 109, 128, 115, 107, 115, 119, 93, 187, 139, 129, 130, 68, 195, 123, 125, 111, 92, 86, 70, 126
Form the grouped frequency table by dividing the variable range into intervals of equal width of 20 g.
The marks obtained by 35 students in an examination are given below :
370, 290, 318, 175, 170, 410, 378, 405, 380, 375, 315, 305, 325, 275, 241, 288, 261, 355, 402, 380, 178, 253, 428, 240, 210, 175, 154, 405, 380, 370, 306, 460, 328, 440, 425
Form cumulative frequency table with class intervals of length 50.