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Statistical Operations
69
12 Statistical Operations
Figure 1 The Menu Map for the Statistics Menu
*ax
2
+bx+c and Quartiles do not apply to the HP 20b.
:z
Press
I
to
select:
2 Vars, 1
Var, or 1
Freq.
Descriptive
(y items 2 Vars
Only)
Predictions
(2 Vars Only)
Sums
(y items 2
Vars Only)
DWN
DWN
INPUT
INPUT
INPUT
DWN DWN
DWN
Nb Item
x Mean
y Mean
x Std. Dev.
y Std. Dev.
x Population
y Population
S.E. Samp. x
S.E. Samp. y
Press I to select:
a*x+b
a*Ln(x) +b
b*e
(a*x)
b*x
a
b*a
x
a/x+b
ax
2
+bx+c*
Sigma x
DWN
Sigma y
Sigma x
2
Sigma y
2
Sigma xy
Quartiles*
(y items 2
Vars Only)
x Min
x Q1
x Median
x Q3
x Max
y Min
y Q1
y Median
y Q3
y Max
DWN
DWN
INPUT
Pred x
Pred y
a
C
(ax
2
+bx+c only)*
Correlation
(Not
ax
2
+bx+c)*
b
Covariance
(Not
ax
2
+bx+c)*
DWN