HP 39g+ - Manual (Page 121)

Inference aplet 9-5
A calculator produces the following 6 random numbers:
0.529, 0.295, 0.952, 0.259, 0.925, and 0.592
Open the
Statistics aplet
1. Open the Statistics aplet and reset the current
settings.
Select
Statistics
The Statistics aplet opens in the Numeric view.
Enter data
2. In the C1 column, enter the random numbers
produced by the calculator.
529
295
952
259
925
592
H I N T If the Decimal Mark setting in the Modes input form
(
modes) is set to Comma, use instead of .
3. If necessary, select 1-variable statistics. Do this by
pressing the fifth menu key until is displayed
as its menu label.
Calculate
statistics
4. Calculate statistics.
The mean of 0.592
seems a little large
compared to the
expected value of 0.5. To see if the difference is
statistically significant, we will use the statistics
computed here to construct a confidence interval for
the true mean of the population of random numbers
and see whether or not this interval contains 0.5.
5. Press to close the computed statistics window.