Can someone please tell me what do we plot on the y-axis when making a histogram of equal class intervals? Is it the frequency or do we plot the frequency density or height of rectangle as we do in histogram of unequal class widths?

Question

directrix · Answer

Variable on the horizontal axis and frequencies on the vertical axis. Check out the example at the link: http://www.statcan.gc.ca/edu/power-pouvoir/ch9/histo/5214822-eng.htm