Histograms and frequency polygons
Descriptive statistics · Mathematics
Study notes
Q: Draw a histogram for classes 0-10 (f=5), 10-20 (f=8), 20-30 (f=12), 30-40 (f=6). Bars: widths all 10, heights = frequencies 5, 8, 12, 6 - bars touch each other. Tallest bar: 20-30 class. Frequency polygon: join midpoints (5,5), (15,8), (25,12), (35,6) with lines, close to axis at (-5,0) and (45,0).