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.
In the wild, ostriches live in â¦ savannas. A savanna is just a grassland ecosystem that has a limited amount of trees and shrubs. Ostriches also live in heaps of other countries worldwide, in zoos and on farms. Due to their unique appearance ostriches are a popular attraction in zoos across the world.They are also farmed for their tasty meat, eggs and their very popular feathers. Ostriches can live in both very cold and fairly warm climates and are found in countries like Sweden, Finland and Australia in zoos and on farms.ue to their unique appearance ostriches are a popular attraction in zoos across the world. They are also farmed for their tasty meat, eggs and their very popular feathers. Ostriches can live in both very cold and fairly warm climates and are found in countries like Sweden, Finland and Australia in zoos and on farms.