why people use histogram to record data
â Institute for Healthcare Improvement. Cambridge, Massachusetts, USA. Often, summary statistics alone do not give a complete and informative picture of the performance of a process. A histogram is a special type of bar chart used to display the variation in continuous data like time, weight, size, or temperature.A histogram enables a team to recognize and analyze patterns in data that are not apparent simply by looking at a table of data, or by finding the average or median. Documents. Institute for Healthcare Improvement. Cambridge, Massachusetts, USA. Often, summary statistics alone do not give a complete and informative picture of the performance of a process. A histogram is a special type of bar chart used to display the variation in continuous data like time, weight, size, or temperature.