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CHAPTER 7
for US
2. Press
E 0 6 to input each parameter (as
shown to the right).
3. Press
Ï
to solve (as shown to the right).
The numerical value within ( ) shows the confidence
bound with level of confidence at 0.99.
* sx indicates sample standard deviation.
* When using the numerical value input mode, n is a positive
integer.
* For the C-level, % input mode is accessed when the
entered value is 1 to 100.
[07 Tint2samp]
Finds the confidence bound of the difference of two sample means, µ
1
and µ
2
, when
the population standard deviations, σ
1
and σ
2
, from two sample data sets collected
from two different populations, are unknown.
<Example 7>
Here, we will find the confidence bound of µ with the level of confidence at 0.95 using
the contents from example 4 (statistical data is assumed to be stored in L2 and L3).
1. Set to list input mode (InputList).
2. Press
E 0 7 to input each parameter (as
shown to the right).
3. Press
Ï
to solve (as shown to the right).
The answer is shown using two screens.
The numerical value within () indicates the confi-
dence bound of the differences between µ
1
and µ
2
when the level of confidence is 95%.
* When using the numerical value input mode, “n1”, “n2” are
positive integers.
EL-9650-(07)En (178-196) 8/1/00, 9:08 AM184
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