Confidence Interval
After setting all the parameters, use c to move the highlighting to “Execute” and then press the function key shown below to perform the calculation.
• 1(CALC) ... Performs the calculation.
Calculation Result Output Example
Left .............................. | confidence interval lower limit (left edge) |
Right ............................ | confidence interval upper limit (right edge) |
o .................................. | mean of sample |
sample standard deviation | |
| (Displayed only for Data: List setting.) |
n .................................. | size of sample |
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| o1 | : mean of sample 1 | |
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Left = (o | – o | ) – Z |
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| σ1 | + |
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| o2 | : mean of sample 2 | |||||||
1 | 2 | 2 |
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| σ1 | : population standard deviation | |||||||||||||
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Right = (o1 – o2) + Z |
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| σ12 | + | σ22 | σ2 | of sample 1 | |||||||||||
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| n2 |
| : population standard deviation |
of sample 2
n1 : size of sample 1
n2 : size of sample 2
Perform the following key operations from the statistical data list.
4(INTR)
1(Z)
20050401