Obtaining frequency distributions

The applicationin the STAT menu can be used to obtain

keep track of those2.Frequenciesvalues that..may be below the minimum and above the maximum class boundaries (i.e., the outliers).

frequency distributions for a set of data. The data must be present in the form

of

a column

vector stored in variable Σ DAT. To get started, press

 

 

. The resulting input form contains the following fields:

Σ

:

the matrix containing the data of interest.

 

:

the column of Σ DAT that is under scrutiny.

 

:

the minimum class boundary to be used in the

 

 

frequency distribution (default = -6.5).

 

:

the number of classes used in the frequency distribution

Bin

 

(default = 13).

 

:

the uniform width of each class in the frequency

 

 

distribution (default = 1).

Given a set of n data values: {x1, x2, …, xn} listed in no particular order, one

can group the data into a number of classes, or bins by counting the

frequency or number of values corresponding to each class. The application in the STAT menu will perform this frequency count, and will

As an example, generate a relatively large data set, say 200 points, by using

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the command RANM({200,1}), and storing the result into variable Σ DAT, by

Col

 

 

 

 

 

 

X-MinCount

 

..

 

 

 

 

 

 

 

 

 

2.FrequenciesWidth

 

example above). Next, obtain single-variable

using function STOΣ (see

informationDAT

using:

 

 

. The results are:

 

 

 

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HP 49g manual Obtaining frequency distributions