In this fourth article in the LabCoat Guide to BioStatistics series, intended as a basic refresher for scientists and technicians, we learn about Statistical Significance, Power and Effect Size. The 5% significance level (a threshold arbitrarily decided on by biologists) ensures we are 95% confident that we will not make a Type-I error (identifying false positives). The power or sensitivity of a test is used to determine the appropriate sample size for a test or experiment. For crop protection researchers, effect size (or treatment effect) is often defined as the minimum improvement in efficacy needed to justify the costs of developing a new pesticide formulation. #statistics #biostatistics #experimentalresearch #cropprotection #bioscience #GuideToEssentialBiostatistics #Experimentaldesign
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