METHODS A mailed survey was sent to 5000 randomly selected women from the United States (controls) and 407 women with IC from a large referral center (cases). The Female Sexual Distress Scale and questions about sexual function, desire, orgasm, and pain were included. The Student t test was used to compare the mean values, and the chi-square test was used to compare the proportions between the ...

Benford’s Law predicts that the first significant digit on leftmost side of numbers in real-life data is distributed between all possible 1 to 9 digits approximately as LOG(1 + 1/digit), so low occur much more frequently than high place. Typically researchers, analysts, and statisticians, rush apply chi-square test order verify compliance or deviation from this statistical law. In almost cases ...

Box and Pierce (1970) proposed a test statistic TBP which is the squared sum of m sample autocorrelations of the estimated residual process of autoregressive-moving average model of order (p,q). TBP is called the classical portmanteau test. Under the null hypothesis that the autoregressive-moving average model of order (p,q) is adequate, they suggested that the distribution of TBP is approximat...

Binary outcomes that depend on an ordinal predictor in a nonmonotonic way are common in medical data analysis. Such patterns can be addressed in terms of cutpoints: for example, one looks for two cutpoints that define an interval in the range of the ordinal predictor for which the probability of a positive outcome is particularly high (or low). A chi-square test may then be performed to compare...

The aim of this paper is to relate and extend some recent work on chi-square goodness-of-fit tests. There is no discussion of any problems which are specifically associated with more than one categorical variable.. The main topics are the effect of estimation on chi-square and its partitions ~~d their relation to Neymants smooth goodness-of-fit test, and the effect of grotp:ing a univariate dis...