HP 49g Graphing Calculator - Manual (Page 172)

Generating Frequencies
Frequency distributions describe how data is distributed across a
specified set of sub-intervals, or bins. You specify:
* the minimum value for data elements to be included in the frequency
distribution
® the bin niunber
• the bin size.
Starting from the minimmn value, the statistics application sets up the
number of intervals. Each interval is set to the size that you specify. From
this, the statistics application defines the maximum value of data to be
sampled.
To set up a frequency distribution for your data, use the following
procedure:
1. Use the method described in “Starting an application and specifying
tire data” on page 9-2 to open the Frequencies input form and to load
the data to analyze.
2. In the X-Min field, enter the minimum value for samples to be included
in the analysis.
3. In the Bin Cormt field, enter the number of intervals, or bins.
4. In the Bin Width field, enter the size of each interval, or bin.
The statistics application calculates the highest value to be included in
the sample.
5. Press
OK.
The following data is returned in a list to history:
- An array of integers, representing the number of data elements that
fell into each inteiwal, from lowest mteiwal to highest interval.
- A two-element vector—the first element represents the number of
elements below the lowest value and the second element
represents the number of elements above the highest allowable
value.
Page 9-4 Using statistics