Online Statistical Courses
Johns Hopkins University Biostatistics Courses
Free biostatistics courses are available from the Johns Hopkins Bloomberg School of Public Health's OpenCourseWare(OCW) project
Carnegie Mellon University Statistical Reasoning Course
Probability and Statistics course is also available on the website of CMU Open Learning Initiative.
Simon Fraser University Intermediate Sampling and Experimental Design Course
P-value CalculatorOnline P-value Calculator
For a sample from a population with a known proabability distribution, a p-value can be calculated using an online calculator. The program was developed by Dr. Hossein Arsham of the University of Baltimore.
Power and Sample Size Calculators
Note: Power and sample size calculation is intended to help design a study. It is not intended to be conducted after the data have already been collected. We highly recommend that a researcher who is planning for a study consults a professional biostatistician well before the initiation of the study.