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.
About. The Field Vole (also known as the short-tailed vole) is very common in grassland, heathland and moorland habitats. Field Voles eat seeds, roots and leaves, and, further up the food chain, form an extremely important part of the diet of many predators, such as Kestrels, Weasels and Barn Owls.ow to identify. Voles can be distinguished from mice by their rounder faces, smaller ears and eyes and shorter tails. The Field Vole is often a greyish-brown or yellowish-brown colour with a pale grey underside. Its tail length is approximately 30% of its body length, thus giving it its' name.