Approximately _____ percent of people with mental disorders are in no way violent or dangerous.

Which of the following is the most recent and accepted theory of colour vision?

a) The trichromatic theory, which states there are three different receptors, one for blue, one for green and one for red. b) The opponent-process theory, which also assumes that there are three different receptors: one for blue-yellow, one for red-green and one for black-white c) Dual-process theory, which takes part of Young-Helmholtz's theory (cone characteristics and function) and part of Hering's theory (cells in visual pathways alter firing dependent on wavelengths) and combines for one theory of colour transduction. d) We are still researching colour vision and what theory you follow depends on what theory you read first. There is no consensus.

Conceptually, the standard deviation for a distribution can be thought of as:

A) the center of the distribution. B) the average frequency for each category. C) the average distance from the mean. D) the distance between the highest and lowest value.