What system are found on earth

Use the normal model n(100,16) describing iq scores to answer the following. a) what percent of people's iqs are expected to be over 85? b) what percent of people's iqs are expected to be under 95? c) what percent of people's iqs are expected to be between 108 and 128?

Atreatment for stuttering in which the person is asked to speak in a singsong fashion, usually with the aid of a metronome is

Which is relatively better: a score of 76 on a psychology test or a score of 22 on an economics test? scores on the psychology test have a mean of 90 and a standard deviation of 13. scores on the economics test have a mean of 52 and a standard deviation of 10.