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December 19, 2014

December 19, 2014

Posted by **Anonymous** on Tuesday, June 12, 2012 at 8:57pm.

- Statistics -
**PsyDAG**, Wednesday, June 13, 2012 at 12:38pmAcceptance or rejection of the null hypothesis depends on what level of significance you are using (e.g., P≤.05, P≤.01) and whether you are using a one-tailed or two-tailed test. If the Z score has that probability or less, reject the null hypothesis. If not, accept the null hypothesis.

We test the hypothesis to determine the probability that the differences found are due only to chance.

If you understand the concept, examples abound. I'll let you find them.

- Statistics -
**Anonymous**, Thursday, September 13, 2012 at 10:01amRandom sample of n=25 scores is obtained from a population of a µ=70 .A treatment is administered to individuals in the sample and after treatment the sample mean M=78 with a standard deviation of s=20

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