HISTOGRAM, Meaning of histogram
Histogram is a graphical representation of frequency distribution. It is made up of a set of rectangles that have their bases on the horizontal axis, i.e. X – axis, and their frequency on the vertical axis, Y – axis. They also have their rectangles at the centre on the class mark (i.e mid point) of each interval.
HOW TO DRAW A HISTOGRAM
The areas of the rectangles are proportional to the class frequencies. In drawing a histogram, there is no gap or space between two bars, unlike the bar chart.
EXAMPLE OF THE USE OF HISTOGRAM
A farmer harvested 60 tubers of yam for eight days. The number of yam harvested per day is shown in table 2.9. Draw a diagram to represent the information.
Table 2.9: Number of tubers of yam harvested in a farm.
|No. of days||1||2||3||4||5||6||7||8|
|Tubers of yam||4||12||7||20||2||9||1||5|
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WEED AND THEIR BOTANICAL NAMES
1. ENVIRONMENTAL FACTORS AFFECTING AGRICULTURAL PRODUCTION
3. 52. SOIL MICRO-ORGANISMS
4. ORGANIC MANURING
5. FARM YARD MANURE
8. CROP ROTATION
9. GRAZING AND OVER GRAZING
10. IRRIGATION AND DRAINAGE