\(Q_1= \frac{(n+1)}{4}th \space\)
\(Q_2, Q_3=?\)
Find \(Q_1, Q_2, Q_3\)
X = 4, 6, 7, 10, 12, 13, 14, 15, 16, 17, 19
4, 8.5, 13, 12.0909091, 15.5, 19 What are the formulae for Deciles (\(D_i\) and \(P_i\))