Thursday, April 14, 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/


16 comments:

  1. Bar chart is quantity vs type, while histogram is frequency vs intervals

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  2. Histogram about frequency while bar graph is about(most of the time) quantity

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  3. Histogram is about the frequency of somethin whereas a bra graph is about the quantity and that thing that you are comparing

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  4. Histogram measures the frequency of the data while the bar graph is the data.

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  5. Histogram measures how frequent the data happens while the bar graph is the data.

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  6. a histogram is putting a frequency table into a form of a bar graph

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  7. The difference is that with a histogram it measures a range while in a bar chart it measures specific amount and it displays it.

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  8. histograms measure in ranges while bar graph measure by the exact amount .
    histogram have no spaces while bar graph is separated

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  9. In historgrams, there are frequencys and intervals. But in bar graphs the y-axis and the x-axis can be anything else.

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  10. Shawn Liew Hong Wei4/21/2011 04:52:00 PM

    A bar graph is to compare the frequency between objects while a histogram is to compare the frequency in a range in a data set.

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  11. A bar graph is to compare the variables in an easy to comprehend way, while a histogram will show the frequency in a set of data.

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  12. Charles O'Rourke4/21/2011 11:50:00 PM

    Histogram is for showing frequency in data and a bar graph is more useful for comparing variables.

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  13. A histogram show the times and intervals of something but the bar graph only shows the frequency between objects of comparison

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  14. Histogram is the frequency of data whereas a bar graph is the quantity and that you are comparing

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  15. Histograms show frequencies of a number while bar graphs compare the numbers itself.

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  16. histograms are for frequency while bar graphs are quantity

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