The ANOVA test is used to compare the means for two or more groups.
Please note that you need Java installed to use this applet. Download Java for free at www.java.com.
Concept design: Dr Dave Stewart
Java Developer: Julie Bernal-Melo
The null hypothesis is Ho: The population means are equal for all data groups and the alternative hypothesis is Ha: At least two of the means are not equal.
This applet can perform the ANOVA test on either 3 or 4 groups. There are three panels in this applet:
- Data panel, which displays populations for sample data.
- ANOVA table
- F-distribution displaying the calculated F-value, the p-value and the critical value.
The calculated F-value and the critical value are compared to accept or reject the null hypothesis.