Final answer:
The symbol that represents the variance of the population is o² (option a). To find the population variance, calculate the deviation of each value from the population mean, square it, multiply it by its corresponding probability, and then sum all the products.
Step-by-step explanation:
The symbol that represents the variance of the population is o² (option a).
To find the variance of a probability distribution for a population, you need to calculate the deviation of each value from the population mean, square it, multiply it by its corresponding probability, and then sum all the products. The formula for population variance is o² = Σ (x - µ)² P(x), where x represents the values of the random variable, µ is the mean of the population, and P(x) represents the corresponding probability.