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Question
Histogram is a graph of a ________ frequency distribution
Options
continuous
discontinuous
discrete
none of these
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Solution
Histogram is a graph of a continuous frequency distribution
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The following is the frequency distribution of waiting time at ATM centre; draw histogram to represent the data:
| Waiting time (in seconds) |
Number of Customers |
| 0 -30 | 15 |
| 30 - 60 | 23 |
| 60 - 90 | 64 |
| 90 - 120 | 50 |
| 120 - 150 | 5 |
The weekly wages (in Rs) of 30 workers in a factory are.
830, 835, 890, 810, 835, 836, 869, 845, 898, 890, 820, 860, 832, 833, 855, 845, 804, 808, 812, 840, 885, 835, 835, 836, 878, 840, 868, 890, 806, 840
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- To calculate mean.
- To determine the Modal class.
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- Write the classes having zero frequency.
- What is the class-mark of the class, having frequency of 50 students?
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- How many students are in the class 80-90?
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(i) Write the number of students getting the highest marks.
(ii) What is the class size?
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| Class | Frequency |
| 0 - 5 | 2 |
| 5 - 10 | 7 |
| 10 - 15 | 18 |
| 15 - 20 | 10 |
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| 25 - 30 | 5 |
| Total | 24 |
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Identify the following data can be represented in a histogram?
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