HP 49g Graphing Calculator - Manual (Page 170)

Descriptive statistics
Use the descriptive statistics applications of the HP 49G to analyze data
stored in a matrix.
® Use the Single-variable statistics application to calculate values
such as the mean, the standard deviation, and the variance for a set of
single-variable statistics, for example one column of a matrix.
® Use the Frequencies application to determine die frequency
distribution for a set of data.
® Use the Fit data application to quantify the relationship between the
data in two colunms.
• Use the Summary statistics application to calculate summaries that
relate to a set of bivariate data.
Starting an application and specifying the data
To start a descriptive statistics application:
1. Press
0(H)
to display the Statistics choose list.
2. Use the arrow keys to select the statistics application that you want,
and press (ENTEB).
The input fomi for the application is displayed.
When you open a statistics application input form, the default data
displayed is data that is contained in the SDAT variable. Fi'om the
statistics application input fonus, you can do either of the following to
specify data to analyze.
• To create new data to analyze, press
edit
to open Matrix Writer. The
data you create is stored in the ED AT variable.
• To select
an
object, for example an existing matrix, press
ghoos
,
and
select the object from the list. The data is copied to the ED AT variable.
Page 9-2 Using statistics