Posted by **Carson** on Friday, March 22, 2013 at 8:50pm.

What are significance/alpha levels and how does using a one versus a two tailed test affect significance levels?

- Psychology/Math -
**PsyDAG**, Saturday, March 23, 2013 at 1:11pm
Alpha levels are the probability of rejecting Ho, when Ho is true. If you are choosing P = .05, a two tailed test will be looking for .025 in either direction. If a one-tailed test, you will be looking for .05 in one direction.

## Answer This Question

## Related Questions

- Psychology/Math - What are significance/alpha levels and how does using a one ...
- Statistics - I'm confused about significance tests. I've tried to look up what ...
- statistics - Perform a two-tailed hypothesis test on the intrinsic variable AND ...
- Statistics - Find the probability of correctly answering the first 2 questions ...
- immediate help needed statistics one tailed hypo - the average weekly earnings ...
- Statistics - 6. If we reject H0:µ = 10 in favor of Ha:µ 10 at a given level of ...
- statistics z or t test - the average weekly earnings of a production worker ...
- statistics - Intrinsic - 5.5, 5.5, 5.2, 5.3, 4.7, 5.5, 5.2, 5.3, 4.7, 5.4, 6.2, ...
- Statistics!!! - b. The correlation between the number correct on a math test and...
- math - In two independent samples from populations that are normally distributed...

More Related Questions