Hello I am trying to work on Median regression analysis for some protein marker data:

The data has age in weeks, protein marker value, the equation is: A*B power of GA

GA age in weeks No of Specimens Protein Marker raw median
14.30 5 18.35

Using the above data I have to calculate median regression ( log linear). The medians must be smoothened by GA age and the equation must be weighed by the square root of the number of specimens for each GA week

Can some one can help me how can I do this calculation.

Thanks
Stan