transparent

Institut für Medizinische Statistik
Besondere Einrichtung für Medizinische Statistik und Informatik - Medizinische Universität Wien

Home
People
Lectures
Research
Consulting
Contact
internal

 

Power/Sample Size Calculator

Inference for a Mean: Comparing a Mean to a Known Value

Choose which calculation you desire, enter the relevant values for mu0 (known value), mu1 (mean of the population to be sampled), and sigma (standard deviation of the sampled population) and, if calculating power, a sample size. You may also modify alpha and the power, if relevant. After making your entries, hit the calculate button at the bottom.

Calculate Sample Size (for specified Power) Calculate Power (for specified Sample Size)
Enter a value for mu0:
Enter a value for mu1:
Enter a value for sigma:
1 Sided Test 2 Sided Test
Enter a value for alpha (default is .05):
Enter a value for desired power (default is .80):
The sample size is:

Comparing  a Mean to a Known Value  Means for Two Independent Samples  a Proportion to a Known Value  Proportions for Two Independent Samples 

Rollin Brant
rollin@health.ucalgary.ca
Reference: The calculations are the customary ones. See for example, Rosner, B., Fundamentals of Biostatistics (4th ed.), Section 7.7.2
transparent

Home - People - Contact - Lectures - Research - Consulting
© 2005 Institut für Medizinische Statistik - FK