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• Press @@@OK@@@ to obtain the following results:
Confidence intervals
The application 6. Conf Interval can be accessed by using ‚Ù—
@@@OK@@@. The application offers the following options:
These options are to be interpreted as follows:
1. Z-INT: 1 µ.: Single sample confidence interval for the population mean, µ,
with known population variance, or for large samples with unknown
population variance.
2. Z-INT: µ1−µ2.: Confidence interval for the difference of the population
means, µ
1
- µ
2
, with either known population variances, or for large
samples with unknown population variances.
3. Z-INT: 1 p.: Single sample confidence interval for the proportion, p, for
large samples with unknown population variance.