800.989.5150

print friendly   Averages, One Sample  |  Averages, Two Samples  |  Percentages, One Sample  |  Percentages, Two Samples One Sample Using Average Values Test Value:  (Value to compare the sample average to) Sample Average:  (Value measured from sample or expected from sample) Standard Deviation for Sample:    Alpha Error Level or Confidence Level:  1% 2% 2.5% 3% 4% 5% 7.5% 10% 15% 20% (Probability of incorrectly rejecting the null hypothesis that there is no difference in the average values). An Alpha of 5% corresponds to a 95% Confidence Interval. Beta Error Level or Statistical Power [1 - Beta]:  1% 2% 3% 4% 5% 7.5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% (Probability of incorrectly failing to reject the null hypothesis that there is NO difference in the average values -- assuming no difference when a real difference exists). A Beta of 50% is used in most simple calculations of sampling error.

© 1995-2009 DSS Research. All Rights Reserved.   Request Info  |  Privacy Policy