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 ...
There are 30 students, so we are looking for the group which contains the \((30 + 1) \div 2 = 15\frac{1}{2}th\) value, which lies halfway betwen the 15th and the 16th value. The cumulative frequency ...
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