So the probability of making a type I error in a test with rejection region R is P R H (| is true) 0. â¢ Type II error, also known as a  false negative : the error of not rejecting a null hypothesis when the alternative hypothesis is the true state of nature.In other words, this is the error of failing to accept an alternative hypothesis when you don't have adequate power.t the heart of Type I error is that we don't want to make an unwarranted hypothesis so we exercise a lot of care by minimizing the chance of its occurrence. Traditionally we try to set Type I error as .05 or .01 - as in there is only a 5 or 1 in 100 chance that the variation that we are seeing is due to chance.
Energy occurs in many forms, including chemical energy, thermal energy, electromagnetic radiation, gravitational energy, electric energy, elastic energy, nuclear energy, and rest energy. These can be categorized in two main classes: potential energy and kinetic energy. Kinetic energy is the movement energy of an object. Kinetic energy may be best understood by examples that demonstrate how it is transformed to and from other forms of energy.
The earliest use of the letter U in physics I can remember from when I was learning it was for potential energy. Total energy = Kinetic energy + Potential Energy. In a closed system potential energy is the amount of energy it would take for an system to reach that state if it were to start at the ground state.