3. For the standard deviation oors and the standard error SE, which of the following is the correct set of descriptions? Os: variability in sample data SE: variability in point estimates from different samples of the same size and from same population σ: variability in population data σ: variability in sample data SE: variability in point estimates from different samples of the same size and from same population s: variability in population data SE: variability in sample data σ: variability in population data s: variability in point estimates from different samples of the same size and from same population Oσ: variability in sample data s: variability in point estimates from different samples of the same size and from same population SE: variability in population data