http://research.uwcsea.edu.sg/eastsec/ibpsychology

Source: Muhlenberg College - http://www.muhlenberg.edu/depts/psychology/docs/statsdecision.pdf

The links below will take you to basic calculators for some commonly used statistal analysis used in pscyhology from Social Science Statistics website.

- Mann-Whitney U-value CalculatorThe Mann-Whitney test is a nonparametric test that allows two groups or conditions or treatments to be compared without making the assumption that values are normally distributed.
- Chi-square CalculatorThe Chi-square tests for association between two categorical variables
- Spearman's Rho CalculatorSpearman's Rho is a non-parametric test used to measure the strength of association between two variables, where the value r = 1 means a perfect positive correlation and the value r = -1 means a perfect negataive correlation.
- Single Sample T-Test CalculatorA single sample t-test (or one sample t-test) is used to compare the mean of a single sample of scores to a known or hypothetical population mean.
- T Test Calculator for 2 Dependent MeansThe t-test for dependent means (also called a paired samples t-test, matched pairs t-test and matched samples t-test) is used to compare the means of two sets of scores that are directly related to each other.
- Sample Size CalculatorThis Sample Size Calculator is presented as a public service of Creative Research Systems survey software. You can use it to determine how many people you need to interview in order to get results that reflect the target population as precisely as needed. You can also find the level of precision you have in an existing sample.
- Australian Bureau of Statistics - Education siteAustralian based website. Education Services assists educators in communicating to students the importance of using quality statistical data to inform and critically analyse their research.