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World Journal of Engineering Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

An Official Publication of Society for Advance Healthcare Research (Reg. No. : 01/01/01/31674/16)

ISSN 2454-695X

Impact Factor : 7.029

ICV : 79.45

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Abstract

THE LOGNORMAL DISTRIBUTION’S GRAPHICALLY ANALYSIS AND ITS POWER

B. Pratikno*, A. A. Pratama and E. L. Wulandari

ABSTRACT

The research discussed the graphically analysis of the probability density function (pdf), cumulative distribution function (cdf), and power and size of hypothesis testing (minimum) of the parameter shape on the Lognormal distribution. In this research, we derived the formula of the power and figured their curve using R code. The result showed that the power Lognormal distribution depended on the degree of freedom n and bound of the rejection area, and parameter shape (?). The curves of the power are sigmoid and they increase and more faster to be one on the small parameter shape (?) and large n.

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