Standard Deviation and Variance Notes Questions \(\textbf{1)}\) Find the mean of the data set. \({10,12,18,19,21,28}\) Show Mean The mean is \(\overline{x}=18\) \(\textbf{2)}\) Find the variance of the data set. \({10,12,18,19,21,28}\) Show Variance The variance is \(var(x)=42\) \(\textbf{3)}\) Find the standard deviation of the data set. \({10,12,18,19,21,28}\) Show standard deviation The standard deviation is \(\sigma\approx6.481\) See Related Pages\(\) \(\bullet\text{ Standard Deviation Calculator (calculator.net)}\) \(\,\,\,\,\,\,\,\,\text{}\)