Standard Z Score to Percentile Calculator

An online std. z score value to percentile calculation and formulas.

Enter Z Score

     

Left / Right / Two Tailed Test

Left Tailed Test H1: parameter < value Notice the inequality points to the left Decision Rule: Reject H0 if t.s. < c.v.
Two Tailed Test H1: parameter not equal value Another way to write not equal is < or > Notice the inequality points to both sides.
Right Tailed Test H1: parameter > value Notice the inequality points to the right Decision Rule: Reject H0 if t.s. > c.v.

P Value from Z score Formula