We have carried out a comparative statistical study for the displacement of the Sun from the Galactic plane ( z _ { \odot } ) following three different methods . The study has been done using a sample of 537 young open clusters ( YOCs ) with \log ( { Age } ) < 8.5 lying within a heliocentric distance of 4 kpc and 2030 OB stars observed up to a distance of 1200 pc , all of them have distance information . We decompose the Gould Belt ’ s member in a statistical sense before investigating the variation in the z _ { \odot } estimation with different upper cut-off limits in the heliocentric distance and distance perpendicular to the Galactic plane . We found z _ { \odot } varies in a range of \sim 13 - 20 pc from the analysis of YOCs and \sim 6 - 18 pc from the OB stars . A significant scatter in the z _ { \odot } obtained due to different cut-off values is noticed for the OB stars although no such deviation is seen for the YOCs . We also determined scale heights of 56.9 ^ { +3.8 } _ { -3.4 } and 61.4 ^ { +2.7 } _ { -2.4 } pc for the distribution of YOCs and OB stars respectively .