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Question
To draw a histogram to represent the following frequency distribution:
| Class interval | 5 – 10 | 10 – 15 | 15 – 25 | 25 – 45 | 45 – 75 |
| Frequency | 6 | 12 | 10 | 8 | 15 |
the adjusted frequency for the class 25 – 45 is:
Options
6
5
3
2
Solution
2
Explanation:
Here, minimum class width = 5
Corresponding frequency of the class interval 25 – 45 = 8
And the width of the interval 25 – 45 = 20
∴ Adjusted frequency = `"Frequency"/("Class width of" (25 - 45)) xx` Minimum class width
= `8/20 xx 5`
= `8/4`
= 2
Hence, the adjusted frequency for the class 25 – 45 is 2.
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