Stem and leaf plots use numbers to help visualize data. The stem part of the plot is considered to be the number to left of the line. The leaf part of the plot consists of the digits to the right of the line. The combination produces a whole number. For instance, the stem of 2 and the leaf of 60 combines together to make the per capita GNP data number of 260.
Wednesday, October 1, 2008
#49 Box Plot
>Source: http://www.onlamp.com/php/2004/07/22/graphics/boxplot.jpgBox plots appear complicated but once learned are easy to read. The box contains the middle set of data. The top of the box represents the 75th percentile and the lower part of the box represents the 25th percentile. The line in the box represents the median of the data. Data sets outside the box are outliers. The specific box plot is one of test takers with varying anxiety levels. The median score of test takers with low anxiety was about 48. Scores ranged from about 26 to 74 on the test, for this particular anxiety level.
#48 Histogram
A histogram is a convenient way to display numerical results or the frequeinces uptained while doing a task. This particular histogram shows the frequinces of the number of times two dice add up to a particular number during trial peirod of 36 rolls.#47 Parallel Coordinate Graph
A parallel coordinate graph is used to plot large numbers of datasets. Certain relations can be obtained through using such a graph.
>Source: http://www.iwi.uni-hannover.de/lv/seminar_ss05/bartke/Assets/parall2.jpg
>Source: http://www.iwi.uni-hannover.de/lv/seminar_ss05/bartke/Assets/parall2.jpg #46 Triangular Plot
A triangle plot is a graph of 3 variables. The proportions of the three variables within the triangle plot add up to a constant. This particular plot shows how the eligible voters of the UK tend to vote in an election. The white circle indicates the results of an pre-elction poll.
#45 Wind Rose
>Soure: http://mensch.org/vplot/windrose2/windrose.pngA wind rose is helpful to meteorologists because it graphically shows both where the wind is coming from and its frequency of the speed. The length of the vectors on the wind rose graph show the percentage of time the wind blew from a particular direction. On this particular chart one can tell that the winds came in from a westerly direction.
#44 Climograph
Climographs graphically show the average precipitation and average temperature at a particular location over a 12 month period of time. This climograph was made using statistics from Memphis, TN. The warmest month tends to be June. Winter and spring months are usually wetter than summer and fall months.
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