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Partial eta-squared is a measure of variance, like r-squared. It tells us what proportion of the variance in the dependent variable is attributable to the factor in question. You can get these measures by choosing the 'Estimates of effect size' option when setting up an ANOVA.
BASIC RULES FOR UNCERTAINTY CALCULATIONS. 1) An Absolute Uncertainty is denoted by the symbol âââ and has the same units as the. quantity. Types of uncertainties: 2) A Relative or Percent Uncertainty is denoted by the symbol âÎµâ and has no units. To convert back and forth between the two types of uncertainties consider the following: m = (3.3 Â± 0.2) kg = (3.3 kg Â± 6.1%) The Absolute Uncertainty is: âm = 0.2 kg = (6.1/100) x 3.3 kg.