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.
What They Eat. Voles prefer vegetation, including tubers, roots, your daylily bulbs and other favorites, grasses and herbaceous plants, including stems, foliage and flowers. They'll devour the roots and bark of trees and eat more seeds and grain during the cold months when other food is less plentiful.