SADC Course in Statistics Excel for statistics Module B2, Session 11.

SADC Course in Statistics

Excel for statistics

Module B2, Session 11

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Learning Objectives

students should be able to:•Explain how an Excel add-in can provide

•the equivalent of a simple statistics package

•Explain what a statistics package contains•Use the SSC-Stat add-in

•to analyse a single column of data

•Distinguish between the use of a package•and learning how to use it

•Know how to find instructions to install• an add-in for Excel

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Contents

• Introduction of the ideas

• Practical work • using the statistics add-in, called SSC-Stat

• Practical work • using SSC-Stat for data analysis

• Discussion and review

• (The SSC-Stat software may have to be installed)

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So far with Excel

• You can organise data (Sessions 9 and 10) • so it is ready for analysis

• You can do some statistics (Sessions 4 to 8)• Tables and graphs

Sort, Filter, Tables, Charts and more charts

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A statistical add-in

• Now we add to Excel’s statistical capabilities

• We use an add-in called SSC-Stat

• It provides an additional menu in Excel:

An additional menu with more facilities

for organising, charting and analysing data

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What is an add-in?

• Excel is a very powerful spreadsheet package

• But no package can have everything

• So Excel also provides facilities:• For users to add extra components to Excel• These are called add-ins• And are provided by 3rd party suppliers• They are not part of Excel when it arrives

• There are many add-ins for statistics• They enhance Excel’s statistical capabilities• We are providing one called SSC-Stat

• Is SSC-Stat already installed in your Excel?• If so, you will see the extra menu shown earlier

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Installing SSC-Stat?

• If SSC-Stat is not installed in your Excel• You need to install it

• Installing SSC-Stat is a 2-stage process• There is a demonstration on the DVD/network

• First install the software on your computer• Find it on a DVD, your network, or the SSC website

• Then go into Excel• And use the Tools => Add-ins menu• To tell Excel you would like this add-in to appear

• Once SSC-Stat is installed into Excel• It will appear each time you use Excel • So you only need to install it once

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How to learn about new software

• A good way to learn it to start using it!

• SSC-Stat has a tutorial

• And we also provide 2 demonstrations

• This way of learning can also give you confidence

• That you can learn about new software• Without always needing a training course

• After the practical work

• We discuss the role of SSC-Stat

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Practical work

• It is mainly to learn the software• Not statistics

• If you also learn some statistics, • then that is a bonus

• But don’t let it distract you • from learning how to use the software

Now it is time for the demonstrations and practical work

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What is SSC-Stat?

• A tiny statistics package

• Designed to support good statistics • with Excel

• Three main menus• Manipulate – to organise the data for analysis• Visualise - to draw graphs• Analyse - to do statistics

• Dialogues to let you choose • which columns to process

• Statistics packages are “column calculators

• Simple statistics use single columns

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SSC-Stat encourages good statistics in ExcelWhat is good statistics with Excel?

• Keep data to be in “list” format

• Use reliable algorithms/calculations• So the summary statistics are correct• Up to Excel 2003 some simple statistics were not reliable• They are, in SSC-Stat

• Produce good tables – see earlier

• Produce good, clear graphs – see earlier

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Other statistics packages• Excel is sufficient as your statistics package

• for this module

• But you could also use a statistics package• if you wish

• They are easy to learn• Especially if you found SSC-Stat easy to learn• Did you – at least so far?

• And they are easy to use

• And they exchange data easily with Excel• If your Excel data are in a list• Which they need to be for SSC-Stat

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SSC-Stat menus and SPSS menus

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SSC-Stat dialogue and Genstat dialogue

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Finally:

Are you now able to

• Explain how an Excel add-in can provide • the equivalent of a very simple statistics package

• Explain what a statistics package contains

• Use the SSC-Stat add-in • to analyse a single column of data

• Distinguish between the use of a package• and learning how to use it

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These last 3 sessions have been mainly on statistical computing

In the next sessions we return to statistics and learn how to process numeric variables.