Which term describes measuring uncertainty and giving a precise measurement of the likelihood that an event will occur?

• A. Probability
• B. Empirical Probability
• C. Variance
• D. Standard Deviation

Answer: (A)

Probability is the measure of uncertainty and the precise likelihood that something will happen. It assigns a number between 0 and 1 (or 0% to 100%) to an event, representing how often that event would occur in the long run. This can be derived from theory (like a fair coin gives a 1/2 chance of heads) or from data (empirical probability, which estimates the likelihood based on observed frequencies). Variance and standard deviation, by contrast, describe how spread out outcomes are around the average, not the chance of a specific event occurring.