Examlex
Which species in the following neutralization reaction are spectator ions? NaOH + HCl → H2O + NaCl
Sample Variance
The measure of variation or spread within a sample set of data, calculated by averaging the squared deviations from the sample mean.
Population Variance
A measure of the dispersion of a set of data points in a population from their mean value, representing how spread out the population values are.
Unbiased Estimator
A statistical estimator whose expected value equals the true value of the parameter it estimates.
Sample Mean
The arithmetic average of a set of sample values, used as an estimate of the population mean.
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