2.1. Histograms and Frequency Distributions http://www.ck12.org
Now you are ready to plot the histogram. Press2ND [STAT PLOT]to enter the STAT-PLOTS menu. You can plot
up to three statistical plots at one time, choose Plot 1. Turn the plot ON, change the type of plot to a histogram (see
sample screen below) and choose L1. Enter “1” for the Freq by pressing2ND [A-LOCK]to turn off alpha lock,
which is normally on in this menu because most of the time you would want to enter a name here. An alternative
would be to enter the values of the variables in L1 and the frequencies in L2 as we did in chapter 1.
Finally, we need to set a window. Press[WINDOW]and enter an appropriate window to display the plot. In this
case XSCL is what determines the bin width. Also notice that the maximumxvalue needs to go up to 9 to show the
last bin, even though the data stops at 8.
Press[GRAPH]to display the histogram. If you press[TRACE]and then use the left or right arrows to trace along
the graph, notice how the calculator uses the notation to properly represent the values in each bin.