The People's Republic of China has an area of about 9,600,000 km2 (3,700,000 sq mi). The exact land area is sometimes challenged by border disputes, most notably about Taiwan, Aksai Chin, the Trans-Karakoram Tract, and South Tibet.
A continuous variable is a specific kind a quantitative variable used in statistics to describe data that is measurable in some way. If your data deals with measuring a height, weight, or time, then you have a continuous variable. Let's further define a couple of the terms used in our definition. A variable in statistics is not quite the same as a variable in algebra. In statistics, a variable is something that gives us data.
3. (Mathematics) maths (of a function or curve) changing gradually in value as the variable changes in value. A function f is continuous if at every value a of the independent variable the difference between f(x) and f(a) approaches zero as x approaches a. Compare discontinuous2 See also limit5.