<Tr> <Td> 5 </Td> <Td> 11 </Td> <Td> 8 </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 7 </Td> </Tr> <Tr> <Td> </Td> <Td> 8 </Td> <Td> 12 </Td> </Tr> <P> The null hypothesis, denoted H, for the overall F - test for this experiment would be that all three levels of the factor produce the same response, on average . To calculate the F - ratio: </P>

Why is a one way anova test used