Set the significance level alpha we pre set it to the most common value 0 05 by default but you can of course adjust it to your needs the critical value calculator will then display not only your critical value s but also the rejection region s.

Question find the t critical value for a right tailed test with a significance level of 0 05 and degrees of freedom 24 answer invt 1 05 24 1 71088 interpretation if the test statistic of the t test is greater than 1 71088 then the results of the test are statistically significant at alpha 0 05.

If the f statistic is greater than the f critical value then the results of the test are statistically significant the f critical value can be found by using an f distribution table or by using statistical software to find the f critical value you need a significance level common choices are 0 01 0 05 and 0 10 numerator degrees of freedom.

Our calculator determines the p value from test statistic and provides the decision to be made about the null hypothesis the standard significance level is 0 05 by default go to the advanced mode if you need to increase the precision with which the calculations are performed or change the significance level.

The f test calculator p value is 0 6553 which is textit greater than the significance level of alpha 0 1 we textit fail to reject the null hypothesis interpretation there is enough evidence to support the claim that the populations of the two brands have the same voltage variations.

While seemingly random the values are of critical importance when evaluating the validity of h 0 result interpretation interpreting the results isn rsquo t very complicated all you have to do is compare the p value to an alpha significance level if the value turns out to be smaller than the alpha level then you can safely reject the hypothesis.