Entering and Removing 2-Variable Data


You enter 2-variable data in much the same way as previously described for 1-variable data. With two variables, however, you must use the [ x~t ] key to store the x value. Before starting a new problem, be sure to select the number of variables and clear the statistics register as described in the section on starting a new statistics problem.


Entering 2-Variable Data Values

Each time you enter a data pair, the calculator displays the number of pairs accumulated.

To enter a single data pair:
  1. Enter the x value and press [ x~t ].
  2. Enter the y value and press [ ∑+ ].
To enter several identical data pairs at one time:
  1. Press [ STAT ], enter the number of pairs, and press { FRQ }.
  2. Enter the x value and press [ x~t ].
  3. Enter the y value and press [ ∑+ ].

Removing 2-Variable Data Values

To remove a pair just after you enter it, press [ INV ][ ∑+ ]. All pairs determined by the last frequency are removed, and the number of pairs remaining is displayed.

To remove a pair after pressing a key other than
[ 2nd ] or [ INV ]:
  1. Reenter the x value and press [ x~t ].
  2. Reenter the y value and press [ INV ][ ∑+ ].
To remove several identical data pairs at one time after pressing any key other than [ 2nd ] or [ INV ]:
  1. Press [ STAT ], reenter the number of pairs, and press { FRQ }.
  2. Reenter the x value and press [ x~t ].
  3. Reenter the y value and press [ INV ][ ∑+ ].

Note:

If you remove more values than you intend, the resulting sum can be negative. To correct this, either reenter the points removed in error, or begin again.


Back