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

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Image 147
HP 33s Scientific manual Initial x, y Corrected x, y, 400, ‘20