Entering and Removing 1-Variable Data


Before performing a statistics calculation, you must enter all the data values into the statistics registers. You can enter the data values individually or enter several identical data values at one time. You can also remove any data values that are entered incorrectly. (An example of entering and removing 1-variable data begins here.)


Entering 1-Variable Data Values

The [ ∑+ ] key enables you to enter data values and display the number of data values accumulated.

To enter a single data value:
  1. Enter the value.
  2. Press [ ∑+ ].
To enter several identical values at one time:
  1. Press [ STAT ], enter the number of data values, and press { FRQ }.
  2. Enter the data value and press [ ∑+ ].

Removing 1-Variable Data Values

The [ INV ][ ∑+ ] key sequence enables you to remove previously entered data values and display the number of data values that remain.

To remove a value just after you entered it, press
[ INV ][ ∑+ ].

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


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