Research of HFMD data using least square method and Interpolation method / Nik Hilwani Athirah Nik Din and Nor Azimah Husain

HFMD is hand, foot and mouth disease that typically a benign and common illness among children. HFMD cases are one of the cases that occur in Malaysia. The estimation number of HFMD cases can be calculated by using mathematical modelling techniques. A few numerical methods have been introduced which is least square method, Newton forward divided difference interpolation method and Lagrange interpolation method in order to help the organizations especially health organization to help calculate and solve on problem such as HFMD cases and other health threat cases which need to be estimate. These methods are chosen because this is the suitable method to use.
This research analysed and compared the error to get the best method and the best equation to estimate the number of HFMD cases. There are three equation that used which is linear, quadratic and cubic equation. The error are calculated using RMSE (root mean square error) and executed using Microsoft Excel 2016.