HP 33s 11–3, 20, 20, 40, 400, Keys:, ‘20 , ‘40 , ‘20 , ‘400 , Display:, ‘20 { ), Initial x, y, Description:, Corrected x, y, Reenters the last data pair

1.Reenter the incorrect data, but instead of pressing , press {. This deletes the value(s) and decrements n.

2.Enter the correct value(s) using .

If the incorrect values were the ones just entered, press {to retrieve them, then press {to delete them. (The incorrect y–value was still in the Y–register, and its x–value was saved in the LAST X register.)

Example:

Key in the x, y–values on the left, then make the corrections shown on the right:

Initial x, y		Corrected x, y
20, 4		20, 5
400, 6		40, 6
Keys:	Display:	Description:

{c{´}		
4	‘20 	)
		)
6	‘400 	)
		)
{		)
		)
{		)
		)
6	‘40 	)
		)
4	‘20 { )
		)
5	‘20 	)
		)

Clears existing statistical data.Enters the first new data pair.Display shows n, the number of data pairs you entered.

Brings back last x–value. Last y is still in Y–register. Deletes the last data pair.

Reenters the last data pair.Deletes the first data pair.

Reenters the first data pair. There is still a total of two data pairs in the statistics registers.

Statistical Operations 11–3