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Message: <blockquote data-quote="JohnJ" data-source="post: 2389179" data-attributes="member: 220699">This is for a college biology class.  The class went out and did a count on the amount of species in different areas, with three repetitions in each area.  Now that all the data are gathered (in an Excel file), it is time to write a report.  I have a hypothesis that state species A exist more in areas that species B are found in.  I have to support this hypothesis, or reject it, using a statistical test, but I am unsure which one to use.  I am thinking about a T-test, but I am unsure how to use it.  The literature online about t-test is a bit confusing.Could anyone with good statistics/biology background help me out with the t-test (eg detailed info on how to use it) or suggest another statistical test?  thanks.</blockquote>