HP 50g User Manual Page 595

Graphing calculator.

These options are to be interpreted as follows:
1. Z-INT: 1 .: Single sample confidence interval for the population mean, ,
with known population variance, or for large samples with unknown
population variance.
2. Z-INT:
-
means,
1
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.
4. Z-INT: p
p .: Confidence interval for the difference of two proportions,
p
-p
, for large samples with unknown population variances.
1
2
5. T-INT: 1 .: Single sample confidence interval for the population mean, ,
for small samples with unknown population variance.
6. T-INT:
means,
-
1
Example 1 – Determine the centered confidence interval for the mean of a
population if a sample of 60 elements indicate that the mean value of the
sample is x = 23.3, and its standard deviation is s = 5.2. Use
confidence level is C = 1- = 0.95.
Select case 1 from the menu shown above by pressing @@@OK@@@. Enter the values
required in the input form as shown:
.: Confidence interval for the difference of the population
, with either known population variances, or for large
2
.: Confidence interval for the difference of the population
, for small samples with unknown population variances.
2
= 0.05. The
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