Sonia Vieira
Sunday, June 01, 2025
Accuracy and precision in measurements
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Accuracy refers to the degree of agreement between the result of a measurement and the true value of the quantity being measured. The mor...
Saturday, May 31, 2025
The Importance of Resolution in Evaluating Measurement Uncertainty
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Resolution is the smallest variation that can be detected by a measuring instrument. For example, a measuring tape with markings every 1 cm...
Thursday, May 29, 2025
Do My Data Need to Be Normally Distributed to Use ANOVA?
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This is one of the most frequent questions asked by those starting to analyze data: “Do my data need to be normally distributed?” Let’s ...
When Unequal Variances Matter in ANOVA — and When They Don’t
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🔴 When the violation of homoscedasticity affects ANOVA 1. Positive kurtosis (above 2): the F test loses power. That is, it tend...
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