
Chapter 9
Using statistics
Contents
Descriptive statistics...................................................................................... 9-2
Starting an application and specifying the data
.................................
9-2
Single-variable statistics..........................................................................9-3
Generating frequencies
..........................................................................
9-4
Fitting a model to a set of data
.............................................................
9-5
Calculating siuranaiy statistics................................................................9-6
Plotting statistics
......................................................................................
9-7
Inferential statistics
........................................................................................
9-7
Example data............................................................................................9-7
Using inferential statistics........................................................................9-8
Hypothesis tests.......................................................................................9-9
Confidence intervals..............................................................................9-15
Introduction
This chapter describes how to use the HP 49G to analyze data statistically.
You can use the HP 49G to analyze two broad categories of statistics:
* Descriptive statistics enables you to calculate values such as the
mean, the variance, and the standard deviation. You can also apply
regression techniques to the data to fit a symbolic model to it.
® Inferential statistics enables you to calculate values such as
confidence intervals. You can also perfonn hypothesis tests based on
the Normal Z- and Student’s t-distributions.
The inferential statistics applications includes online help. On any of
the inferential statistics screens, press HELP to display help on how to
complete the screen.
Using statistics
Page 9-1
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