σ2 = Σ (xi-μ)2 * P (xi) where: xi: The ith value. μ: The mean of the distribution. P (xi): The probability of the ith value. For example, consider our probability distribution for the soccer team: The mean number of goals for the soccer team would be calculated as:How do you calculate density and relative density?
How do you calculate the relative density of a species? Density is calculated as the total number of individuals of a species. Relative density is calculated by dividing the density by the sum of the densities of all species, multiplied by 100 (to obtain a percentage).