It is a secondary relationship because Erik does not have and entanglement with the video-game salesman. The only relationship there is the exchange of video games for money. The relationship is casual and on a neutral level of exchange.
Answer:Approximately 68% of the data fall within one standard deviation of the mean. Approximately 95% of the data fall within two standard deviations of the mean. Approximately 99.7% of the data fall within three standard deviations of the mean.
