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KMID : 1007520230320111479
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Food Science and Biotechnology
2023 Volume.32 No. 11 p.1479 ~ p.1487
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Problems and alternatives of testing significance using null hypothesis and P-value in food research
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Choi Won-Seok
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Abstract
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A testing method to identify statistically significant differences by comparing the significance level and the probability value based on the Null Hypothesis Significance Test (NHST) has been used in food research. However, problems with this testing method have been discussed. Several alternatives to the NHST and the P-value test methods have been proposed including lowering the P-value threshold and using confidence interval (CI), effect size, and Bayesian statistics. The CI estimates the extent of the effect or difference and determines the presence or absence of statistical significance. The effect size index determines the degree of effect difference and allows for the comparison of various statistical results. Bayesian statistics enable predictions to be made even when only a small amount of data is available. In conclusion, CI, effect size, and Bayesian statistics can complement or replace traditional statistical tests in food research by replacing the use of NHST and P-value.
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KEYWORD
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Null hypothesis significance test, P-value, Confidence interval, Effect size, Bayesian statistics
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