![]() 18, Boulder police announced that two CU students had been hospitalized early that morning at Boulder Community Health after “unknowingly ingesting drugs while drinking alcoholic beverages at parties on University Hill.” Five days later, Aulabaugh said three more CU students came forward with similar allegations. Experts warn, though, that alcohol- and drug-related crimes - which can boil down to one person’s word against another’s - can be difficult to prove when evidence is hard to come by and memories are hazy. Since then, students have held a protest on campus as they clamor for answers about what happened to their classmates. The Boulder chapter’s future will be determined following the conclusion of Sigma Pi’s own investigation, the fraternity said.įive women came forward to the Boulder Police Department last month saying they believed they were drugged while partying on the Hill, the quintessential collegiate business and residential district popular with students that’s just across the street from the CU campus. This means it cannot participate in or host any events, including chapter meetings, social events or recruitment activities. “Sigma Pi has a zero-tolerance policy for illegal drug use and a zero-tolerance policy for any type of assault,” Frost wrote in an email to The Denver Post on Thursday after several requests for comment on the women’s allegations that they were drugged on the Hill. “Whenever any policy or law is broken by any member of Sigma Pi, we hold them responsible and respond accordingly, up to and including expulsion.”įollowing publication of this story, Sigma Pi’s national office issued a news release expanding on Frost’s statement to The Post, saying the Boulder chapter has been “temporarily suspended” while the investigation proceeds. He said the national office shut down the fraternity and launched an internal investigation, and is “fully cooperating” with CU officials. No arrests have been made in connection with the druggings, and when asked about that investigation Thursday, Boulder police spokeswoman Shannon Aulabaugh said, “Sigma Pi is not considered a suspect at this time.”īecause all the women had attended multiple parties, police said they couldn’t confirm where the students believed they were drugged.īut Jonathan Frost, executive director of the Tennessee-based Sigma Pi Fraternity and Foundation, said in an email Thursday that he was “aware of the reports and allegations” surrounding the Boulder chapter. The national office of the Sigma Pi fraternity has ordered its Boulder chapter to cease operations after five University of Colorado students told police they believe they were drugged while attending parties on the college town’s University Hill last month.īoulder police are investigating an alleged assault that was reported at the Sigma Pi house, 1111 College Ave., on the same night the first two drugging victims were hospitalized. In mathematical notation, these facts can be expressed as follows, where Pr() is the probability function, Χ is an observation from a normally distributed random variable, μ (mu) is the mean of the distribution, and σ (sigma) is its standard deviation: In statistics, the 68–95–99.7 rule, also known as the empirical rule, is a shorthand used to remember the percentage of values that lie withinĪn interval estimate in a normal distribution: 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively. The y-axis is logarithmically scaled (but the values on it are not modified). ![]() Prediction interval (on the y-axis) given from the standard score (on the x-axis). ![]() Shown percentages are rounded theoretical probabilities intended only to approximate the empirical data derived from a normal population. JSTOR ( September 2023) ( Learn how and when to remove this template message)įor an approximately normal data set, the values within one standard deviation of the mean account for about 68% of the set while within two standard deviations account for about 95% and within three standard deviations account for about 99.7%.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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