A Simulation of Sample Variance Calculation in the Teaching of Business Statistics to English Majors
Variance is important for statistical description of a data set. Yet, the denominator of (n–1) in sample variance calculation confuses many Business English learners of statistics. In order to give learners an impressive instruction, a statistical simulation of population and sample variance calculation is designed with self-code Python program. The experimental simulation shows that the sample variances calculated with divisor of (n–1) are averagely closer to population variance than with n. The latter underestimates the population variance. The simulation offers an important explanation for statistics learners and can help them learn business statistics better.
KeywordsBusiness statistics Business English Sample variance Statistical simulation
This research was supported by Graduate Education Innovation Plan of Guangdong Province (2015JGXM-MS22) and the Science and Technology Innovation Project of Guangdong Province (2013KJCX0070).
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