Variance

This exercise focuses on calculating the mean ($\bar{x}$), variance ($\sigma^2$), and standard deviation ($\sigma$) for different types of data, including ungrouped data, discrete frequency distributions, and continuous frequency distributions. Mean and Variance for Ungrouped Data (Q. 1–3) The formulas for ungrouped data are: $$\bar{x} = \frac{\sum x_i}{n} \quad \text{and} \quad \sigma^2 = \frac{1}{n} \sum (x_i … Read more