Statistics plots

15.1Set up a statistics plot#

Press 2ndSTAT PLOTy= (STAT PLOT). Choose Plot1, Plot2 or Plot3 to edit it; 4 PlotsOff and 5 PlotsOn switch all three. On the setup screen choose On, the plot Type, the lists to use, the mark and the colour. Turn the plot on, then press graph or use ZoomStat so the data fits the window.

15.2Draw a scatter plot#

Example 15.1

Scatter plot of three points

1. Store {1,2,3} in L1 and {2,4,5} in L2.

   2nd{(1,2,32nd})sto→2ndL11enter2nd{(2,4,52nd})sto→2ndL22enter

2. Open STAT PLOT, choose 1, move left to On and press enter.

   2ndSTAT PLOTy=1◀enter

   

3. Press zoom and 9 (ZoomStat), then open WINDOW to see the fitted window.

   zoom9window

15.3Draw a histogram#

Choose Hst as the type. The width of each bar is Xscl and the first bar starts at Xmin, so set both in WINDOW (ZoomStat chooses them for you).

Example 15.2

Choose the histogram type

1. Open Plot1, switch it on, move down to Type and choose Hst.

   2ndSTAT PLOTy=1◀enter▼▶▶enter

15.4Draw a box plot#

A box plot shows the minimum, first quartile Q1, median, third quartile Q3 and maximum. Use MBx to see outliers (values more than $1.5\times IQR$ beyond the box) as separate dots.

15.5Switch all plots on or off#

Example 15.3

PlotsOn

1. Press 2nd yeq then 5 (PlotsOn), then open the menu again.

   2ndSTAT PLOTy=52ndSTAT PLOTy=