4 | ENTER |
20
5 I
ENTER
I
20
[2+1
2^
1.0000
2.0000
Deletes
and
replaces
the first pair (20, 4 to
20, 5). Still two pairs
total.
Statistical
Calculations
Once you have entered your statistical data, you can use the functions
in the
STAT
menu. Press Bl
stat
Ito display the
STAT
menu.
The
STAT
Menu
Menu
Label
Description
{2}
The summationmenu:n, 2x, 2y, 2x2, 2y2, 2xy. See "Sum
mation
Statistics."
{*,?}
The
mean
menu:
x,
y
and
weighted x (xw).
See
"Mean
and
Standard
Deviation."
{s}
The standard-deviation
menu:
sx and sy. See
"Mean
and
Standard
Deviation."
{L.R.}
The
linear-regression menu: curve-fitting (r, m, b)
and
linear
estimation (x, y).
See
"Linear Regression."
Mean
and
Standard
Deviation
The
Mean
(x,
y)
Menu.
• Press Bl
stat
I
{x,y}
{x}
for the arithmetic mean
(average)
of the
x-values.
Press Bl
stat
I
{x,y}
{y}
for the arithmetic mean (average) of the
y-values.
156
11:
Statistical
Operations
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