Although histograms and box plots are collectively part of the chart aid category, they do represent very different types of charts. Both charts effectively represent different data sets; however, in certain situations, one chart may be superior to the other in achieving the goal of IDENTIFYING VARIANCES AMONG DATA. The type of chart aid chosen depends on the type of data collected, rough analysis of data trends, and project goals.
A histogram is highly useful when wide variances exist among the observed frequencies for a particular data set. As seen in the two graphs to the left, the histogram shows that there are three peaks within the data, indicating it is tri-modal (three commonly recurring groups of numbers). This is important because to improve processes, it is critical to understand what is causing these three modes. Had this data simply been graphed using a box plot, the values would average one another out, causing the
what does a dot plot show, that a histogram doesn't?
2 answers
Um I didn't say this before! but English please.