Test statistics that follow a chi-squared distribution arise from an assumption of independent normally distributed data, which is valid in many cases due to the central limit theorem. A chi-squared test can be used to attempt rejection of the null hypothesis that the data are independent.
Voles, also known as mice, live in field, forest, and shrub habitats. Voles can cause extensive damage when they move into our turf and landscaped gardens in search of food and shelter. Voles do not hibernate and are active throughout the year. They can reproduce year round having many litters per year.
Voles are small mouse-like animals that do severe damage to tomato plants. The animals sometimes chew the stems and leaves, or they may just eat through the stems, leaving a severed tomato plant. Often, evidence that voles are eating your plants are narrow grooves in the leaves, which are created by the animal's two front teeth.