Inequalities close inequalityUsed to identify a range of values, eg -1 ≤ × ≤ 2 means values from -1 to 2. are often used to describe the groups in the table. For example, the interval 0 < 𝑡 ≤ 5 means ...
Mean Formula: Check what is mean, its definition and its formula here. Also, get solved examples of calculating mean for grouped and ungrouped data using direct mean formula and assumed mean method.