Histogram Analysis
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
  • Determine the amount of dispersion present in a characteristic's data.
  • Obtain a "feel" for the shape of a characteristic's distribution, and if it is normally distributed.
  • Generate descriptive statistics for sample data.