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Showing 1 to 20 of 39 for “"Goodness of fit test"”.
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Calculating chi-squared test statistics for weighted histograms
A goodness of fit test statistic, in particular the chi-squared test, is commonly used to confirm whether histograms differ from a theoretical distribution. The chi-squared test is also often used to compare two histograms, such as histograms produced by experiments and simulations. This report …
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Stability of a Normal Heterosexual Female Response to Affinity 2.0
The purpose of the current study was to evaluate the temporal stability of a normal heterosexual female response to the Affinity 2.0, a newly standardized viewing time (VT) instrument that purports to measure sexual interest. Participants were 120 female undergraduate and graduate students from a …
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Kolmogorov-Smirnov test for grouped data
Herein is presented a Kolmogorov-Smirnov test for grouped samples. It constitutes an application of W. J. Conover's procedure, which was originally designed for calculating exact critical levels for test with discrete distributions. This test extends the goodness-of-fit test to samples which are …
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Language identification by statistical analysis.
An analysis was conducted of English and Spanish text. The statistical analysis determined the independent probability of letters and the joint probability of various letter combinations for large samples of each language. Various methods were tested in an attempt to utilize these characteristics …
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Modeling repairable system failure data using NHPP reliability growth mode.
… have been widely used to describe the behaviour of repairable systems. The Crow nonhomogeneous Poisson process (NHPP) often known as the Power Law model is regarded as one of the best models for repairable systems. The goodness-of-fit test rejects the intensity function of the power law model, …
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Approximating the distributions of x2-type mixtures via matching four cumulants
Nonparametric goodness-of-fit tests often result in test statistic which can be written as a random variable of chi-square-type mixtures. Zhang (2003) proposed to approximate its distribution using a random variable of form chi-square-type mixtures via matching the first three cumulants. In this …
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Framing in crime news
The purpose of this study was to investigate if televised news programs overrepresent or underrepresent certain races as perpetrators or victims. Three weeks of crime news programming were surveyed. The races of perpetrators and victims were identified and coded. Those findings were then compared …
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Goodness-of-Fit for Length-Biased Survival Data with Right-Censoring
Cross-sectional surveys are often used in epidemiological studies to identify subjects with a disease. When estimating the survival function from onset of disease, this sampling mechanism introduces bias, which must be accounted for. If the onset times of the disease are assumed to be coming from a …
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A graphical approach for goodness-of-fit of Poisson model
Extensive work has been done on goodness-of-fit (GOF) tests for data assumed to have come from univariate continuous distributions; however, literature on GOF procedures for univariate discrete distributions is rather sparse in compariSon The Poisson distribution in particular has received much …
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Application Of The Empirical Likelihood Method In Proportional Hazards Model
… analyzing real data sets, checking the validity of the model assumptions is a key component. However, the presence of complicated types of censoring such as double censoring and partly interval-censoring in survival data makes model assessment difficult, and the existing tests for goodness-of-fit …
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Nonparametric and semiparametric methods for interval-censored failure time data
… data, we mean that the failure time of interest is not completely observed. Instead, we only know that it belongs to a certain interval. For the analysis of interval-censored data, what interests researcher most include comparisons of survival functions for different treatment groups …
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The goodness-of-fit tests for geometric models
We propose two types of goodness-of-fit tests for geometric distribution and for a bivariate geometric distribution called BGD(B&D), based on their probability generating function (PGF). The first type is a special-case application of the general testing procedure for discrete distributions …
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Probabilistic Modeling and Verification of Large Scale Systems
… behavior. Such stochastic behavior is the result of the randomness in the systems' operating environments. It can also be the result of the use of randomized protocols that are used to reduce the need for costly synchronization. We abstract a system state as a probability mass function (pmf); a …
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Microhabitat Affinity of Blanchard's Cricket Frog (Acris crepitans blanchardi) in Rural and Urban Areas in Central Texas
Habitats of small anurans are being encroached upon by land development in central Texas. Blanchard’s cricket frog (Acris crepitans blanchardi) is a small frog occupying small streams in these areas of disturbance. I investigated microhabitat affinity of Blanchard’s cricket frog to assess whether …
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The Challenge Within : Diversity Training In Teacher Education
The Problem. Because the population of the United States continues to change, and schools must adjust to meet the challenge of educating a diverse body of students, Teacher Education Programs must look within to identify what characteristics of difference are addressed and how they are addressed to …
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Students' Criteria for Course Selection: Towards a Metadata Standard for Distributed Higher Education
By 2007, one half of higher education students are expected to enroll in distributed learning courses. Higher education institutions need to attract students searching the Internet for courses and need to provide students with enough information to select courses. Internet resource discovery tools …
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Parametric quantile regression based on the generalised gamma distribution
Quantile regression offers an extension to regression analysis where a modified version of the least squares method allows the fitting of quantiles at every percentile of the data rather than the mean only. Using the well-known three-parameter generalised gamma distribution to model variation in …
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Light microsite requirements of seedlings of some Afromontane forest tree species: the role of canopy gaps promoting regeneration
Predictions of microsite requirements for seven common Afromontane forest tree species were made by testing above ground relative growth rate (RGR) and photosynthetic response of seedlings of the respective species under different light intensities. Virgilia oroboides and Halleria lucida, with …
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Testing for neutrality and rationality with an open-economy model: the case of Canada
… monetary policies may affect the relative price of domestic to foreign goods, the domestic unemployment rate was not neutral with respect to foreign monetary policies. Using Canada as the small open economy and the United States as the rest of the world, the weak open economy version of the …
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AN EMPIRICAL ANALYSIS OF LIBYAN BUSINESS ENVIRONMENT AND FOREIGN DIRECT INVESTMENT
The economic development needs of developing countries require capital accumulation, which is no longer an easy task, even for industrialised countries. Although borrowing remains an important alternative, it has proved to be an expensive method in the long run. Consequently, to attract foreign …
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