Answer question fast .

Answer question fast . II

Dear Student,
Firstly, we will arrange all the terms in ascending order!

130

145

159

160

178

198

200

210

234

257

260

300

345

360

390

$$\begin{gathered} Q_1=\frac{n+1}{4}=\frac{15+1}{4}=\frac{16}{4}=4th term \\ {Q}_1=160 \\ {Q}_3=3\left(\frac{n+1}{4}\right)=3\left(\frac{15+1}{4}\right)=\frac{48}{4}=12th term \\ {Q}_3=300 \\ Quartile deviation=\frac{Q_3-Q_1}{2} \\ =\frac{300-160}{2} \\ =70 \\ Coefficient of Quartile deviation=\frac{Q_3-Q_1}{Q_3+Q_1} \\ =\frac{300-160}{300+160} \\ =\frac{140}{460} \\ =0.304 \end{gathered}$$