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Histogram Analysis
QC-CALC can generate Histogram charts which provide an indication of the
frequency of occurrence of sample values over a range of measurements. A
Histogram chart provides a bar style graph as shown below. The pattern of the
bars provides an indication of the distribution of the sample data. If the bars
are arranged with the tallest at the approximate center and the shorter bars at
the left and right extremities of the range, the distribution is most likely to
be normal.
Use of the Histogram Chart
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Determine the amount of dispersion present in a characteristic's data.
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Obtain a "feel" for the shape of a characteristic's distribution, and if it is
normally distributed.
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Generate descriptive statistics for sample data.
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