# How to test consistency for data?

## Question:

How to test for consistency for data when N = 100, (A) = 150, (B) = 300 and (AB) = 200?

## Solution:

| B |
| Total |

A | (AB) = 200 | (A | (A) = 150 |

| | | |

Total | (B) = 300 | | N = 1000 |

## Answer:

Using a 9 sqare table, we find frequency of (A**β) = -50. Since the frequency is negative, the given data is inconsistent. **Any class frequencies cannot be greater than total population for the data to be consistent. Hence each class frequency must be less than or equal to "N" for the data to be consistent. Any class frequencies cannot be negative for the data to be consistent. Hence each class frequency must be greater than or equal to 0 for the data to be consistent.