It is much more clear to write:
σy = [109., 102., 96., 89., 71.] # standard deviations of y
w = 1 ./ σy.^2 # weights for LsqFit
It is much more clear to write:
σy = [109., 102., 96., 89., 71.] # standard deviations of y
w = 1 ./ σy.^2 # weights for LsqFit