How do I find the intervals I think or the number to count by in a histogram

Asked By Lily On 02/28/2017 02:58


Histograms are similar to bar graphs, but instead of counting a specific value it is measuring a range. So for example, a bar graph that measures how long 20 students took taking a test would give you an exact count of specific data. For this example lets say that 5 students finished in 15 minutes, 8 finished in 30 minutes, 2 finished in 45 minutes and 5 finished in one hour. On the bar graph you would plot the x axis as the time taken to finish the test and y axis as the number of students. On the other hand, a histogram would measure what category/range those students fall into instead of a specific measurement. So taking the same example on the histogram you would plot: 5 students finished in 0-15 minutes, 8 finished in 15-30 minutes, 2 finished in 30-45 minutes and 5 finished in 45 minutes to 1 hour. The graph axis labels in this case would be x = time interval and y = number of students.
Answered On 03/02/2017 08:32