By using the above data compute the quartile coefficient of skewness

Quartile coefficient of skewness = (Q3 + Q1 - 2Q2)/(Q3 + Q1)                               

The position of Q1 lies on = (610 + 1)/4

        = 152.75

∴ Actual value Q1 =55. 5 +  {(152.75 - 94)/97} * 5 = 58.53

The position of Q3 lies on       =  3{(610 + 1)/4}

= 485.25

∴ Actual value Q3 =70.55 + {(458.25 - 403)/83} * 5 = 73.83 × 5

Q2 position:     that is  2{(610 + 1)/4} = 305.5

Actual Q2 value  

Conclusion

Similarly as above when the Pearsonian coefficient was utilized