One approach to seeing how data values are dispersed is to plot the frequency of occurrence of each observed value. It categorizes all the data values in the data set in cells or groups on the X-axis.  Then a vertical height depicts the frequency of that observed value.		References in this course: M1L2T2, p. 2/32
Hysteresis is an error that can be observed by comparing the difference between a measurement made as the load is increasing versus the measurement of the same point as the load is decreasing.		References in this course: M2L3T2, p. 9/33