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April 18, 2014

April 18, 2014

Posted by **Becky** on Wednesday, April 20, 2011 at 3:04pm.

- Statistics -
**MathGuru**, Wednesday, April 20, 2011 at 7:38pmUsually 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.

The alternate or alternative hypothesis tells you whether or not the test is directional or nondirectional. If the alternate hypothesis uses "greater than" or "less than" symbols, the test is directional. If the alternate hypothesis uses "does not equal" in its statement, then the test is nondirectional.

I hope these few hints will help.

- Statistics -
**ray**, Monday, July 11, 2011 at 6:52pmThe computed t was -.926 with df of 24 for p>.o5. what may you say about the null hypothesis?

- Statistics -
**anonoymn**, Monday, July 11, 2011 at 7:04pmTHE f-RATIO WAS 2.293 WITH DF OF (12,8)) FOR P>.05. What may you say about the alternate hypothesis.

- Statistics -
**Tem**, Thursday, August 1, 2013 at 6:46amI would say the alternate hypothesis is rejected

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