During the last decades, no researches have conducted in order to prove some properties of the of the multivariate power series distribution, as results of the present study proved that any multivariate power series distribution is determined uniquely from the mean -function of any marginal random variable. Furthermore these results indicated also that any given function satisfying certain conditions construct a random vector with multivariate power series distribution which has a mean of the marginal random variable. A useful technique can be applied in model building when we have information about the mean-function.
The purpose of this study is to examine the effects of the high school outputs on the students' achievement in the College of Sciences at Al-Hussein Bin Talal University. Since students' achievement is correlated with all major educational elements such as students, instructors, university administration, supervision, school administration, and other more, two elements are discussed in this study. These two elements are the high school students' achievements and the time of graduation. The sample of this study is applied on the 324 students of the College of Sciences at Al-Hussein Bin Talal students who attended the college on the academic years
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