SOCSCI 2J03 Study Guide - Quiz Guide: Standard Deviation, Mutual Exclusivity

• School: McMaster University
• Department: Social Sciences
• Course: SOCSCI 2J03
• Professor: Rizwan Tahir

Document Summary

For any number k greater than 1, at least (1 1/k ) of the data values lie within k standard deviations of the mean. 68% of the observations lie within one standard deviation of the mean. 95% of the observations lie within two standard deviations of the mean. 99. 7% of the observations lie within three standard deviations of the mean. Addition rule to find the probability of the. P (a or b) = p(a) + p(b) Addition rule to find the probability of union of two mutually nonexclusive events. P (a or b) = p(a) + p(b) p(a and b) P (a and b) = p(a) x p(b |a) or p(b) x. P (a and b) = p(a) x p(b)