Final answer:
The two symbols that represent a statistic are Σ (Summation) and μ (Mean). Σ is used for summation in statistical calculations, and μ represents the population mean.
Step-by-step explanation:
The question asks us to select two symbols that represent a statistic from the options provided. Two symbols that represent a statistic are Σ (Summation) and μ (Mean).
Σ is used to denote the sum of a set of values, which is often used in statistical formulas to represent the sum of all products xP(x), where x represents values of the random variable X, and P(x) the corresponding probability.
μ, pronounced 'mew', is the Greek letter that represents the population mean in statistics. It is a parameter, which means it describes some characteristic of a population. For example, μ might represent the mean salary of all managers in a particular industry.