5. Sofian and Fakhrul with several research assistants planned to conduct a study at a certain forest reserve area to estimate the mean wood volume in six compartments with the bound on the error of estimation of 4m2 ha which is equal to two standard deviations. The past record on the study area gave the following information: Compartment Population of tree Population variance (m ha) 150 144 210 256 180 196 cm A 14 300 484 110 100 120 144 They know that the sample collection process from the forest needs some cost but the cost of sample collection in all compartments is unknown. How many total of sample (n) and the stratum sample size (nA, nB, nC, D, E and nF) should they collected? PO10 (16 Marks) 5. Sofian and Fakhrul with several research assistants planned to conduct a study at a certain forest reserve area to estimate the mean wood volume in six compartments with the bound on the error of estimation of 4m2 ha which is equal to two standard deviations. The past record on the study area gave the following information: Compartment Population of tree Population variance (m ha) 150 144 210 256 180 196 cm A 14 300 484 110 100 120 144 They know that the sample collection process from the forest needs some cost but the cost of sample collection in all compartments is unknown. How many total of sample (n) and the stratum sample size (nA, nB, nC, D, E and nF) should they collected? PO10 (16 Marks)