Casio kalkulačka 300 PLUS Příručka

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753 Stránky Anglicky

Casio kalkulačka 300 PLUS
Stránky
Z
753
20050501
2-Sample t Interval
Command: TwoSampleTInt
Description: This command obtains the confidence interval for the difference between two
population means when the population standard deviations are unknown.
The confidence interval is obtained using the following expressions.
The confidence level is 100 (1 –
α
)%.
When the two population standard deviations are equal (pooled)
Left = (o
1
o
2
)t
α
2
Right = (o
1
o
2
)+ t
α
2
n
1
+n
2
–2
n
1
1
+
n
2
1
x
p
n–1
2
σ
n
1
+n
2
–2
n
1
1
+
n
2
1
x
p
n–1
2
σ
When the two population standard deviations are not equal (not pooled)
Left = (o
1
o
2
)– t
df
α
2
Right = (o
1
o
2
)+ t
df
α
2
+
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
+
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
C =
df =
1
C
2
n
1
–1
+
(1C )
2
n
2
–1
+
n
1
x
1 n–1
2
σ
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
Command Syntax
Syntax 1 (list format)
C-Level value, List(1), List(2), Freq(1) (or 1), Freq(2) (or 1), Pooled condition (On
or Off)
* “Freq” can be omitted. Doing so sets “1” for “Freq”.
* “Pooled” can be omitted. Doing so sets “Off” for “Pooled”.
Syntax 2 (parameter format)
C-Level value, o1 value, x1
σ
n-1 value, n1 value, o2 value, x2
σ
n-1 value, n2 value,
Pooled condition (On or Off)
* “Pooled” can be omitted. Doing so sets “Off” for “Pooled”.
7-10-7
Confidence Intervals
Obsah
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