LocalJumpError (Ruby)

Question

Hi

I'm getting an odd LocalJumpError which only occurs when I'm in staging or production on Ubuntu. When I'm in development environment and passing the same data to the method, I don't get the error. The error is being returned when I attempt to pass data to the following method:

def standard_deviation_percentage(population)
    return nil if population.empty?
    count = population.size
    mean = population.inject(:+) / count.to_f
    return ((Math.sqrt( population.inject(0) { |sum, e| sum + (e - mean) ** 2 } / count.to_f ))/mean)*100
end

Can anybody suggest where I am going wrong?

Thanks