The CDF of an i.i.d. sample realizations

Is it possible to draw the CDF of the empirical measure $\hat{P}_x$ for a i.i.d. sample realizations where $X_1 = 0.3$,$X_2 = 5$,$X_3 = 1.5$, $X_4 = 3.4$ without knowing the distribution?

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@did do we assume that each value has a 25% probability of occurence? thanks – ChuckM Oct 2 '12 at 6:31
Wikipedia gives 10 different ways of estimating the quantiles – Henry Oct 2 '12 at 7:36
ok I now I see what should be the correct way – ChuckM Oct 2 '12 at 8:08
thanks @did. how can I approve your answer? – ChuckM Oct 2 '12 at 19:16