Sentry CA756, Instruction Manual

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64
65
* Erroneous data clearing/correction I (Correct data
operation: 51 )
If 50 is entered, enter correct data after pressing
.
If 49 was input a number of entries previously,
enter correct data after pressing 49 .
* Erroneous data clearing/correction II (correct data
operation: 130 31 )
If 120 is entered, enter correct data after
pressing .
If 120 31 is entered, enter correct data after
pressing .
If 120 30 is entered, enter correct data
after pressing .
If 120 30 was entered previously, enter
correct data after pressing 120 30 .
Regression calculation
• Regression calculations are performed in the LR mode (
). "LR" appears on the display.
• Before beginning calculations, the tabulation memories
are cleared by pressing followed by and then
.
• Individual data are entered as x data y data
• Multiple data of the same value can be entered by
repeatedly pressing . This operation can also be
performed by entering x data y data
followed by a value representing the number of times the
data is repeated, and then .
• If only x data is repeated (x data having the same value),
enter y data or y data
followed by a value representing the number of times the
data is repeated, and then .
• If only y data is repeated (y data having the same value),
enter x data or x data followed by a
value representing the total number of times the data is
repeated, and then .
•
Regression
The following are the formulas the unit uses to calculate
constant term A and regression coefficient B for the
regression formula y = A + Bx.
• Estimated value , and based on the regression
formula can be calculated using the following formulas:
(To obtain the estimated value , is used, and
to obtain estimated value , is used.)
• The correlation coefficient r for input data can be
calculated using the following formula:
* The values for n,
∑
x,
∑
x 2 ,
∑
xy,
∑
y, and
∑
y 2 are stored in
memories W, V, U, R, Q and P respectively, and can be
obtained by pressing followed by the memory
name and then (i.e. ).