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Question
Define the following term:
Discrete frequency distribution
Solution
Discrete frequency distribution is a frequency distribution where sufficiently great numbers are grouped into one class.
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RELATED QUESTIONS
Define the following term:
True class limits
Following figures relate to the weekly wages (in Rs) of 15 workers in a factory:
300, 250, 200, 250, 200, 150, 350, 200, 250, 200, 150, 300, 150, 200, 250
Prepare a frequency table.
(i) What is the range in wages (in Rs)?
(ii) How many workers are getting Rs 350?
(iii) How many workers are getting the minimum wages?
The marks obtained by 40 students of class VIII in an examination are given below:
16, 17, 18, 3, 7, 23, 18, 13, 10, 21, 7, 1, 13, 21, 13, 15, 19, 24, 16, 3, 23, 5, 12, 18, 8, 12, 6, 8, 16, 5, 3, 5, 0, 7, 9, 12, 20, 10, 2, 23.
Divide the data into five groups, namely 0-5, 5-10, 10-15, 15-20 and 20-25 and prepare a grouped frequency table.
The following is the distribution of weights (in kg) of 52 persons:
| Weight in kg | Persons |
| 30-40 | 10 |
| 40-50 | 15 |
| 50-60 | 17 |
| 60-70 | 6 |
| 70-80 | 4 |
(i) What is the lower limit of class 50-60?
(ii) Find the class marks of the classes 40-50, 50-60.
(iii) What is the class size?
Construct a frequency table with class-intervals 0-5 (5 not included) of the following marks obtained by a group of 30 students in an examination.
0, 5, 7, 10, 12, 15, 20, 22, 25, 27, 8, 11, 17, 3, 6, 9, 17, 19, 21, 29, 31, 35, 37, 40, 42,45, 49, 4, 50, 16.
The data that can take values between a certain range is called ________
Viji threw a die 30 times and noted down the result each time as follows. Prepare a table on the numbers shown using Tally Marks.
| 1 | 4 | 3 | 5 | 5 | 6 | 6 | 4 | 3 | 5 | 4 | 5 | 6 | 5 | 2 |
| 4 | 2 | 6 | 5 | 5 | 6 | 6 | 4 | 5 | 6 | 6 | 5 | 4 | 1 | 1 |
The heights (in centimeters) of 40 children are.
| 110 | 112 | 112 | 116 | 119 | 111 | 113 | 115 | 118 | 120 |
| 110 | 113 | 114 | 111 | 114 | 113 | 110 | 120 | 118 | 115 |
| 112 | 110 | 116 | 111 | 115 | 120 | 113 | 111 | 113 | 120 |
| 115 | 111 | 116 | 112 | 110 | 111 | 120 | 111 | 120 | 111 |
Prepare a tally marks table
The data can be arranged in a tabular form using ______ marks.
| Number of two wheelers |
Tally marks | Number of families |
| 0 | ||| | 3 |
| 1 | `cancel(|bb|bb|bb|)` `cancel(|bb|bb|bb|)` `cancel(|bb|bb|bb|)` `cancel(|bb|bb|bb|)` `cancel(|bb|bb|bb|)` ||| | 28 |
| 2 | `cancel(|bb|bb|bb|)` `cancel(|bb|bb|bb|)` |||| | 14 |
| 3 | |||| | 4 |
| 4 | | | 1 |
| Total | 50 |
Prepare a bar graph of the data.
