Quartile deviation = ?Select one:a.Q_3 - Q_1b.Q_1 - Q_3c.(Q_3 - Q_1)/2d.(Q_3 - Q_1)*2

Break Down the Problem

1. Identify what quartile deviation means.
2. Recall the formula for quartile deviation.

Relevant Concepts

3. The quartile deviation (QD) is a measure of spread or dispersion in a data set. It is calculated based on the first quartile (Q_1) and the third quartile (Q_3).

Analysis and Detail

4. The formula for the quartile deviation is defined as: $QD = \frac{Q_3 - Q_1}{2}$ Here, $Q_3$ is the third quartile and $Q_1$ is the first quartile.

Verify and Summarize

5. Based on the formula, when we analyze the options provided, the correct expression for quartile deviation matches option c.

Final Answer

The correct answer is c. $(Q_3 - Q_1)/2$.