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A-20 Tables and Reference Information
8399APXA.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 1:25 PM Printed: 02/19/01 1:40 PM
Page 20 of 58
Function or Instruction/
Arguments Result
Key or Keys/
Menu or Screen/Item
1
.
PropZInt(
x
,
n
[
,
confidence level
]
)
Computes a one-proportion
z
confidence interval.
†
…
TESTS
A:1
.
PropZInt(
13
-
20
2
.
PropZInt(
x1
,
n1
,
x2
,
n2
[
,
confidence level
]
)
Computes a two-proportion
z
confidence interval.
†
…
TESTS
B:2
.
PropZInt(
13
-
21
1
.
PropZTest(
p0
,
x
,
n
[
,
alternative
,
drawflag
]
)
Computes a one-proportion
z
test.
alternative
=
L
1
is <;
alternative
=
0
is
ƒ
;
alternative
=
1
is >.
drawflag
=
1
draws results;
drawflag
=
0
calculates results.
†
…
TESTS
5:1
.
PropZTest(
13-14
2
.
PropZTest(
x1
,
n1
,
x2
,
n2
[
,
alternative
,
drawflag
]
)
Computes a two-proportion
z
test.
alternative
=
L
1
is <;
alternative
=
0
is
ƒ
;
alternative
=
1
is >.
drawflag
=
1
draws results;
drawflag
=
0
calculates results.
†
…
TESTS
6:2
.
PropZTest(
13-15
Pt
.
Change(
x
,
y
)
Reverses a point at (
x
,
y
).
y
[
DRAW
]
POINTS
3:Pt
.
Change(
8
-
15
Pt
.
Off(
x
,
y
[
,
mark
]
)
Erases a point at (
x
,
y
) using
mark
.
y
[
DRAW
]
POINTS
2:Pt
.
Off(
8
-
15
Pt
.
On(
x
,
y
[
,
mark
]
)
Draws a point at (
x
,
y
) using
mark
.
y
[
DRAW
]
POINTS
1:Pt
.
On(
8
-
14
PwrReg
[
Xlistname
,
Ylistname
,
freqlist
,
regequ
]
Fits a power regression model
to
Xlistname
and
Ylistname
with frequency
freqlist
, and
stores the regression equation
to
regequ
.
…
CALC
A:PwrReg
12
-
27