Thursday, April 7, 2011

Data Handling (Histogram)

A. What is a Histogram?
histogram is "a representation of a frequency distribution by means of rectangles whose widths represent class intervals and whose areas are proportional to the corresponding frequencies." 


B. How do you Plot/Draw a Histogram?
Hint: Note the following
.1 Data Range (its continuous not discrete)
.2 The x- and y- axes labels
.3 The interval of the histogram

C. Shodor histogram activity
Click here to manipulate a Histogram.
The Shodor histogram activity allows you to change the bin size for a data set and the impact on the curve.

D. How do we analyse Histograms?
Histograms allow us to analyze extremely large datasets by reducing them to a single graph 
source: http://quarknet.fnal.gov/toolkits/new/histograms.html



E. Question to PONDER and post your RESPONSES as comment
What are the differences between Histogram and Bar Graphs?


You may refer to the following links
http://mathcentral.uregina.ca/QQ/database/QQ.09.99/raeluck1.html
http://www.differencebetween.net/science/difference-between-bar-graph-and-histogram/


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