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Question
The monthly consumption of electricity (in units) of some families of a locality is given in the following frequency distribution:
| Monthly consumption (in units) |
140 –160 | 160 – 180 | 180 – 200 | 200 – 220 | 220 – 240 | 240 – 260 | 260 – 280 |
| Number of families |
3 | 8 | 15 | 40 | 50 | 30 | 10 |
Prepare a ‘more than type’ ogive for the given frequency distribution.
Graph
Sum
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Solution
The frequency distribution table of more than type is as follows:
| Height (in cm) (lower class limit) | Cumulative frequency (cf) |
| More than 140 | 3 + 153 = 156 |
| More than 160 | 8 + 145 = 153 |
| More than 180 | 15 + 130 = 145 |
| More than 200 | 40 + 90 = 130 |
| More than 220 | 50 + 40 = 90 |
| More than 240 | 30 + 10 = 40 |
| More than 260 | 10 |
Taking the lower class limits of on x-axis and their respective cumulative frequencies ony-axis, its ogive can be drawn as follows:
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Is there an error in this question or solution?
