# 代写assignment-假设检验分析

As in the case of all statistical hypothesis tests, the tests of SEM model are set in accordance with the assumption that there has been modelling of complete and correct relevant data. In the literature of SEM, discussion regarding fit has resulted in a number of different recommendations for precisely applying a number of hypothesis tests and fit indices (Bro & Smilde, 2014). Providing directions to the direct SEM with directed network model arises out of presumed assumptions of cause and effect in context with reality.
Social artifacts and interactions are often presumed as secondary phenomena, termed as epiphenomena that cannot be directly linked with the causal factors. More or less the same as all tests of statistical hypothesis, the tests of SEM model are set on the basis of the assumption for modelling relevant data correctly and completely (O’Rourke & Hatcher, 2013). Further ahead, there is a significant impact of factors such as policy claims and statistical implications. These can be considered as the key reasons for confusion and suspicion across quantitative methods in the field of social sciences. T-Test functions for assessing if the means calculated for two different groups have statistical difference or not. There is appropriateness of this analysis whenever there is willingness for comparing two different groups in terms of their means. This helps in analysing the two- group, pesttest-only experimental randomized design. There is idealized actual distribution in depicting a bar graph or histogram (Hill et al., 2006). The question addressed by the t-test is if there are statistical differences in the means.
ANOVA stands for analysis of variance. This method is a combination of statistical models utilized for the analysis of difference between group means along with the procedures associated. In the setting of ANOVA, the variance observed within a specific variable is divided as components attributes with variation of different forms (Hill et al., 2006). In simple terms, ANOVA helps in providing statistical test if or not there is equality in the means of various groups. Hence, there is generalization of t-test being easier for comparison.
Chi- square is a statistics based test used most commonly for comparing data observed with data expected to be gather in accordance with certain hypothesis. There can be performance of this particular by referring to eigenvalue decomposition over a matrix of data, with covariance of singular value in a data matrix (Hill et al., 2006). However, irrespective of the method being so popular and useful, the key argument is that there is embedding of first generation utilization of method within the conventional practice. More often, they tend to be invoking a model of measurement defining latent variables by the use of several observed variables.