Statistics question- when doing a t-test, is the alpha you set, the same thing as the level of significance?

Question

Say I want to set my alpha at .05. Is that .05 the same as the level of significance for the hypothesis/study?

Answer 1

Yes!

http://en.wikipedia.org/wiki/Significance_level



The significance level is usually represented by the Greek symbol, α (alpha). Popular levels of significance are 5%, 1% and 0.1%. If a test of significance gives a p-value lower than the α-level, the null hypothesis is rejected. Such results are informally referred to as 'statistically significant'. For example, if someone argues that "there's only one chance in a thousand this could have happened by coincidence," a 0.1% level of statistical significance is being implied. The lower the significance level, the stronger the evidence.



In some situations it is convenient to express the statistical significance as 1 − α. In general, when interpreting a stated significance, one must be careful to note what, precisely, is being tested statistically.

Answer 2

Two terms are confused; level of significance and statistically significant hypothesis. First, the level of significance is the value the test if based on. in other words how sure is the test. 5% mans that your results have a 95 certainty. Medical tests are normally performed at 99%. Statistical significance is if the result has attracted a t-value with a p-value (normally called significance and denoted as sig.) which is lower that the alpha (a). Alpha = (100%-the level of significance/100). for example if 95% is the level of significance, then, alpha = (100-95)/100 = .05. So if p<.05 then the result is statistically significant (null hypothesis is rejected).

Answer 3

The coaching won via JWs is the comparable the international over. All talks from the platform ought to comply with Society coaching. All public talks ought to acquire from a Society define (it is so exhaustive it leaves little room for the rest). Even solutions given via JWs to questions from the platform ought to believe what the Society has revealed. No deviation from Society coaching is tolerated. The administration exercised from headquarters is so strict that any one keeping to a differing perception on any element might the two ought to close up and positioned up, or pass away the employer. This uniformity, which JWs boast approximately publicly, isn't biblical, as even a cursory examining of the hot testomony shows. Paul suggested there have been many 'disputable concerns' that should not be argued over. The Watchtower Society tolerates no dispute approximately something. Christian denominations agree solidly on the foundational, considerable doctrines of the religion, yet they comprehend others distinctives. Cultural ameliorations are additionally absorbed in healthy Christian circles. yet while any JW disagrees approximately something, he dare no longer voice it publicly, so the real answer on your Q is, 'particular, yet purely publicly.'