If your are a statisitics student or a PhD student doing some research then this online calculator http://www.danielsoper.com/statcalc/ will be of great help to you.
This calculator was built by Daniel S. Soper, Ph.D and now there are over 1 million users using this calculator!
The calculator is useful for the following statistical models:
• ANALYSIS OF VARIANCE (ANOVA)
• BETA FUNCTION
• CHI SQUARE DISTRIBUTION
• CONFIDENCE INTERVALS
• CORRELATIONS
• COVARIANCES
• CUMULATIVE DISTRIBUTION FUNCTION (CDF)
• EFFECT SIZE
• ERROR FUNCTION
• FISHER F-DISTRIBUTION
• GAMMA FUNCTION
• GAUSSIAN (NORMAL) DISTRIBUTION
• HIERARCHICAL MULTIPLE REGRESSION
• MEDIATION MODELS
• MISCELLANEOUS
• MULTIPLE REGRESSION
• PROBABILITY
• PROBABILITY DENSITY FUNCTION (PDF)
• SAMPLE SIZE
• STATISTICAL POWER
• STUDENT’S T-DISTRIBUTION
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