If you have the block reward and pool hash rate and you know the percentage that Labcoin received from that block reward then you can estimate the hash rate. I don't have the equation in front of me because I'm not a math nerd but I'm sure someone here can explain it to you.
That is correct. However to apply the equation you need access to those numbers you mentioned. Do you know the block reward, pool rate and Labcoin percentage at this moment?