Bigger/Smaller or not equal test

For some statistical tests it is possible to check if the comparing data-set is bigger or smaller or not equal. Testing if the data-set is bigger or smaller gives a 2 times more significant result because this is a one sided test. In some statistical environments it is not allowed to use one-sided tests. The safest test is not equal and is used as the default setting.

In Develve the p value when using bigger/smaller is always halve of the value when calculated in not equal mode. You self have to look if it is bigger or smaller than the comparing value. This increases the overview of the results.

Tests Bigger/Smaller or not equal test option

Test what	With what statistical test
Difference in Mean	t-test
Difference in Median non Normal data	Wilcoxon–Mann–Whitney-test
Difference in Variation	Variation F-test
Difference in Variation non Normal data	Variation Levene test
Difference in two proportions (Data set with only good or false results)	Proportions