Texas Instruments Calculator User Manual page 70

Variable
Number of observations
Mean (average) of X values
Sample standard deviation of X
Population standard deviation of X
Mean (average) of Y values
Sample standard deviation of Y
Population standard deviation of Y
Linear regression y-intercept
Linear regression slope
Correlation coefficient
Predicted X value
Predicted Y value
Sum of X values
Sum of X squared values
Sum of Y values
Sum of Y squared values
Sum of XY products
* nn represents the number of the current X or Y value.
** Not displayed for one-variable statistics.
*** This guidebook categorizes calculator variables by their method of
entry. (See "Types of Worksheet Variables" on page 17.)
Resetting Statistics Worksheet Variables
• To clear all
of the worksheet without affecting the statistics calculation method,
press & z while in the data-entry portion of the worksheet
(& j).
• To reset the statistics calculation method to
except and
X
and computation portion of the worksheet (& k).
• To reset the statistics calculation method to
including
X
Entering Data Points
• You can enter up to 50 (x,y) data points.
If you press # or " to move through the portion of the worksheet
•
that displays results without entering data points, the calculator will
display an error.
66
and values as well as all values in the statistics portion
X Y
, press & z while in the calculation method
Y
, press & } !.
and
Y
Key Display Variable Type
# (as
n
v
needed)
Sx
sx
y**
Sy**
sy**
a**
b**
r**
X'**
Y'**
GX
2
GX
GY**
2
GY
**
GXY**
LIN
LIN
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Enter/compute
Enter/compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
Auto-compute
and clear all values
and clear all values,
Statistics Worksheet