Question

In a plant trial, the number of plants that had diseases and rotten leaves were 4 and those without disease but had rotten leaves was 6. The number of plants observed to have the disease without rotten leaves was 2 and those with healthy leaves was and no disease was 8. The chi square value was?

Answer 1

Chi-square value = (4-2)^2/2 + (6-2)^2/2 + (2-2)^2/2 + (8-2)^2/2 = 8