Very cheap software (you pay for a three year licence) and very easy to use, as it is based on a spreadsheet. Indeed, it is possible to copy and paste data between Excel and StatsDirect. Also, for those who are not well-versed in statistics, there is an inexpensive book by Cole Davis called Statistical Testing in Practice, which teaches basic statistics (and some more complex stuff as well), using StatsDirect. This can be found on http://www.coledavis.org/book.html
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