Sample Size Calculator Using Percentage Values

Number of Samples ONE TWO

Test Value (%) Value to compare the sample percentage to

Sample Percentage (%) Value measured from sample or expected from sample

Alpha Error Level or Confidence Level

(Probability of incorrectly rejecting the null hypothesis that there is no difference in the percentage values). An Alpha of 5% corresponds to a 95% Confidence Interval.

Beta Error Level or Statistical Power [1 – Beta]

(Probability of incorrectly failing to reject the null hypothesis that there is NO difference in the percentage values — assuming no difference when a real difference exists). A Beta of 50% is used in most simple calculations of sampling error.

Sample Size

Partner with a Trusted Leader

Gain more in-depth insights and make more informed decisions with SPH.

Contact SPH