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March 2, 2015

March 2, 2015

Posted by **Carol** on Saturday, September 21, 2013 at 1:59pm.

- Statistics -
**MathGuru**, Saturday, September 21, 2013 at 5:08pmHow about a one-sample t-test?

Usually you use z-tests when sample sizes are large (n is greater than

or equal to 30) whether or not you know the population standard deviation.

If you do not know the population standard deviation and have a small

sample (n < 30), then you can use t-tests.

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