Here you can visualize what the values you have to take for the Live Loads in your calculations mean.
Operate the slider Load (kN/m2) for setting usual values of Live Loads and check how many people these values correspond to.
Now let´s think about it: with how many kN/m2 (Live Load) should you design buildings for housing purposes? Check with the model how many people this value really mean. Is there usually so many people at your place? Then why should we use such a value?