Which of the following is a statistic ?

The correct answer is Option (2) → Selecting 10 students from a class and finding their mean height to represent average class height

A statistic is a numerical summary calculated from a sample of the population.

Option 1: Only describes the process of selecting a sample, not calculating any sample measure.

Option 3&4: Both involve calculating a measure for the entire population, making them parameters.

Option 2: Involves selecting and calculating mean height to represent the class average. This is statistic.