Objective To evaluate the calculation and report of detection index and the statistics analysis of group comparison in high risk group, a problem of medical science study.

目的探讨医学研究中出现的一类问题，即高危人群检出指标的计算、报告及组间比较的统计学检验的正确性。

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In January, the average number of people in city homeless shelters hit a record 50, 000, a 19% jump from the previous year and a 61% rise since Mr. Bloomberg took office in 2002, according to a report based on city statistics from the Coalition for the Homeless, an advocacy group.

WSJ: Mayor Hits Shelter Rule