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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.