HP 33S, User Manual

Page: 147 / 388

Statistical Operations
11–3
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
1. Reenter the incorrect data, but instead of pressing
/
, press
¹ -
. 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
¹ Í
to retrieve
them, then press
¹ -
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:
¹ ¡
{

}

Clears existing statistical
data.
4
Ï
20
/

 Enters the first new data
pair.
6
Ï
400
/


Display shows n , the
number of data pairs you
entered.
¹ Í

 Brings back last x –value.
Last y is still in Y–register.
¹ -


Deletes the last data pair.
6
Ï
40
/

 Reenters the last data pair.
4
Ï
20
¹ -


Deletes the first data pair.
5
Ï
20
/


Reenters the first data pair.
There is still a total of two
data pairs in the statistics
registers.