Summation Statistics
The STAT menu includes {Z} for calculating n, =x, Zy, =x2, Zy?, and
2xy.
Example: Summation Statistics. Calculate Zx and =x? for the fol-
lowing values of x: 2.345, 3.456, 4.567.
Keys:
Display:
Description:
B(CLEAR] {=}
Clears the statistical
registers.
2.345
Enters the data.
3.456
4.567
n=3.0000
{2} {x}
Ex=10.3680
Calculates Zx.
{z} {x2}
Ix2=38.3005
Calculates Zx2.
5: Statistical Calculations
69