Stats Menu

A short description of each Stats operation can be seen by hovering the cursor over each button. Most of the operations in the "Stats" menu give statistical information on a list of numbers (see using lists for details on how to enter a list) and are fairly standard calculator operations. Two of the operations operate on a list of x,y points and are described below.

Note on Performing Multiple Stat Operations on One List of Data

If you want to do multiple stat operations on the same list, it is best to label the list on the stack, then do the operations using the name of the label rather than the original list. Otherwise the list gets consumed by the statistics function and you will have to undo the function if you want to reuse the same list in a new function.

LinRegr [LinRegr] and r [Corr]

The linear regression function and correlation coefficient function work on a list of points. Say you have the following points on which to run a linear regression:

(1, 1.1), (2, 1.9), (3.3, 3.1)

That list my be entered in the calculator in two different ways, depending on whichever is most convenient for the user:

{(1, 1.1), (2, 1.9), (3.3, 3.1)}

   or

({1, 2, 3.3}, {1.1, 1.9, 3.1})

The first method corresponds to a list of x,y coordinate pairs, the second method corresponds to a list of x values and a list of y values combined into a pair of corresponding lists. Note that in either case each "( )" should contain a pair of corresponding x,y values - either two lists or two numbers.

Note that a LinRegr entry on the stack may be graphed, showing the linear regression line together with the original list of points.