### Introduction to FX Stat 3

Introduction to FX Stat 3
Getting Started
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When you open FX Stat you will see three separate areas
FX Stat Thinks in Columns
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You enter data into columns.
You graph columns. Formulas
and data generators operate on
a whole column at once. Think
columns!
There are different types of
columns. In the screen shot you
can see a group column, a
frequency column, a normal
data column and a label
column.
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Enter some data (any data) into
Column A
Right click on the column and
choose Quick Graph
Changing the Graph Type

Change the graph type to suit your needs. For the moment,
choose a Univariate graph type.
Right Click on Graph

Many features are accessed by right-clicking on the graph
• Axes, Scales, Grid and
Titles & Legend give
you more control over
the graph
• The screen shows the
options for Line
Graphs. Other graph
types have their own
screen.
• The DataSet options
control the way each
dataset is shown.
Data Set Options
• Data set options let you choose
how a data set is displayed.
You can change colours, line
thickness, point type and size.
You can also choose the colour
that FX Stat uses to highlight
selected data.
• The graph type button
(marked) is used to combine
graph types on one graph.
This is discussed later.
Summary Statistics

Now that we have our first graph, we can look at the
summary statistics for the data. Only a small selection of
the available statistics are shown below. Scroll down for
more.
Getting Data
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You can enter your own data (Yuck!)
You can copy data from other sources (like Excel) and paste them
into FX Stat.
You can generate data to fit your needs using FX Stat’s Data
Generators. This is so efficient that you can easily generate a
different data set for each student if you wish.
The four buttons take you to different pages of the data generator.
Data Generators
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generator from the left.
FX Stat will give you a
description of the
distribution
Fill in the parameters
you need
Push OK. The data
generator will put the
column.
Reuse Formulas

If you have used a data generator (or entered a formula
into a column) pushing the Reuse Formula button will
reuse the formula (including the parameters you have
set) in the currently selected column. This allows you to
quickly generate multiple sets of data.
Number of Data Sets

FX Stat can graph 24 data
sets on one set of axes.
Six sets are easily
accessible, the other 18
require you to push the
More button.

Some graph types (pie,
divided bar, stem and leaf
and back to back
histograms) can only graph
a limited number of data
sets.
Graphing Bivariate Data
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Bivariate data needs data
from two columns
When you choose a
bivariate graph type, you
will notice that the data set
buttons now have two
locations to fill.
To graph bivariate data, use
Quick Graph twice.
Trivariate data requires
three columns (how
surprising!)
Graphing Frequency
Tables
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Change a column
next to a data
column to f by right
clicking on it and
choosing Set to
Frequency
Quick Graph the
FREQUENCY
column
The graph and
summary statistics
will now be for the
frequency
information.
Entering Grouped Data
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Grouped data is similar to
frequency tables – you have a
group column and an attached
frequency column.
Enter groups using the 10-20
notation which FX Stat
automatically interprets as
10 <= x < 20
FX Stat will normally automatically
identify group columns as you enter
them.
Quick Graph the FREQUENCY
column.
The Problem with Data
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Statistics graphs are difficult and often a matter of opinion. Problems
usually show up when people start adding cumulative frequency
curves or frequency polygons to their graphs.
Just about everything that you consider to be the “right way” of
graphing statistics (particularly grouped data) is “obviously incorrect
(you idiot)” somewhere in the world. This is a nightmare for us!
The problem is not totally solvable because what you expect FX
Stat to produce for a set of data is subtly different, depending on the
context of the question. The difference is so subtle that we don’t
always manage to convince people it exists.
The problem exhibits when you use graphs which group data.
Groups
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groups and frequencies,
FX Stat will almost
certainly produce what
you are after, even if it
makes no sense.
Graphing Continuous
Data
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If you ask FX Stat to draw a histogram of some
continuous data, FX Stat will automatically group it and
draw a graph. This will usually be what you want but you
may need to manually change the group width by rightclicking on the graph.
If you can’t get
FX Stat to
produce the
exact groups you
want, enter your
own.
Graphing Discrete(ish)
Data – Here Be Demons!
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Here we have added a cf curve to the graphs. Which
graph is correct?
Well…… it depends on the context. BOTH are correct
depending on the circumstances.
FX Stat will produce Graph 1. Graph 2 can be produced
by grouping the data.
The Solution
If you cannot get FX Stat to produce
what you want, explicitly enter your
own groups or use FX Stat to group
existing data into groups you have
created.
Mixing Graph Types 1
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Graph the same data TWICE.
Set the graph type to one of the two graphs types you want.
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Edit the second data set (by pushing the data set button
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Mixing Graph Types 2
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Change the graph type for the second data set. You will have a
reduced selection as not all graph types can be mixed.
Mixing Graph Types 3
Fill Down
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Often you can minimize your data entry by using fill down.
Typing Formulas
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Click in a cell and type =
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FX Stat can do all sorts of calculations on
columns. Column B = 2A. Column C is the rank
of the numbers in column B
More details of the available commands can be
found in the Help file.
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Email Tutorials

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Efofex provides comprehensive training for FX Stat 3
available as convenient email tutorials. Register at
www.efofex.com/emailtutes.php. The system will send
an email a day for a few weeks.
Email tutorials are available for all Efofex products.