The prevalence of johnny's inappropriate behavior time during the 30 minutes of math class was summarized as .20. the characteristic of behavior that was probably measured to arrive at this number is

The characteristic of behavior that was probably measured to arrive at this number is duration, very different from when the behavior is measured by the number of times it occurs in a periord of time, where it can be measured by the frequency that occurs or the number of times that happens in that time, in other cases it can be measured up to the intensity of it.

Clean air provides nitrogen