67
Editing statistical data
Change the previously entered data from page 65 as follows:
Procedure
Key operation
Display
Display the statistical
data.
i
X1=
3000
Change the “40, 2” data
set to “45, 3”.
i
i
45
J
i
3
J
FRQ2=
300
Delete “50”.
i
.
?
Stat —
000
Add “60”.
60
J
DATA SET=
300
Statistical Calculations and Variables
The following results can be obtained for each statistical calcula-
tion (refer to the table below):
Single-variable statistical calculations
Section
1
results only.
Linear regression calculations
Section
1
and
2
results, except for coeffi cients
c
.
The estimate of
y
for a given
x
(estimate
y
´) and the estimate of
x
for a given
y
(estimate
x
´) can also be found.
Quadratic regression calculation
Section
1
and
2
results, and coeffi cients
a
,
b
, and
c
in the qua-
dratic regression formula (
y
=
a
+
bx
+
cx
2
). In quadratic regres-
sion calculations, no correlation coeffi cient
r
can be obtained.
DATA
30
40
40
50
DATA
30
45
45
45
60
