A Study of Reversing Decision in Population Proportion Test in the Case of Delayed Observations

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Rungrawee Amnarttrakul

Abstract

This research was to study the percentage of reversing decision of population proportion test in the case of delayed observations by means of simulating 3 levels of population proportion conditions which were p = 0.3, 0.5 and 0.7 The number of successes within the study period was determined in each level under the relationship [(p − 0.2)(0.02)(p + 0.2)]*100 ,when the sample size was n = 100 and the delayed observations were m = 20, 40 and 60. The number of successes after the study period was randomly generated. There were 189 situations and each situation was simulated 10,000 times. The reversing decision was considered between the conclusion of the z statistic test, when the data were within the study period, and the conclusion of the z* statistic test, when the delayed observations were gathered. The percentage of reversing decision of population proportion test was then calculated. Interestingly, it was found that there was a high percentage of the reversed decision in some situations.

Article Details

How to Cite
Amnarttrakul, R. (2020). A Study of Reversing Decision in Population Proportion Test in the Case of Delayed Observations. Journal of Science Ladkrabang, 29(2), 101–114. Retrieved from https://li01.tci-thaijo.org/index.php/science_kmitl/article/view/241684
Section
Research article

References

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