Significance Level Formula for Confidence Interval

You can use confidence intervals to check whether your results are significant. The given below is the significance level formula for confidence interval which helps you in the level significance calculation for both one-tailed and two-tailed test. As per the one tailed test formula, to find the significance level deduct the confidence level from 100. And two tailed formula shows that just divide the value of one-tailed significance test by integer 2, to get the level of significance.


For One Tailed
l = 100 - c

For Two Tailed
l = (100 - c) / 2


l = Significance Level
c = Confidence Level

Related Calculator:

Make use of the above significance level formula for confidence interval to check whether the P value is less than the significance level, which indicates that your results are statistically significant.

english Calculators and Converters