The constructor accepts an array of observed frequencies, an alpha probability cutoff score, and an optional array of expected probabilities.

构造函数接受一个由观察到的频率组成的数组、alpha 概率断开点（cutoff score）和一个可选的期望概率的数组。

youdao

Internationally, "giftedness" is most frequently determined by a score on a general intelligence test, known as an IQ test, which is above a chosen cutoff point, usually at around the top 2-5%.

在国际上，“天才”最常由一项智商测试（IQ test）的分数决定，这些“天才”的测试分数高于选定的分界线，通常在前2%至5%左右。

youdao

Q. tests are used to diagnose people as mentally retarded, with a score of 70 generally taken to be the cutoff.

NEWYORKER: None of the Above

For instance, some lenders may give the best rate to people with a FICO score above 740, while others may use a cutoff of 760 or higher.

WSJ: Getting Going: Why the Latest Credit-Score Fixes Fall Short