Statistics, Machine Learning, Data Science, Central Limit Theorem, Sample.
further: Taking a sample: When you take a sample, you “realize” the values of the r.v.s A_1, …, A_N, meaning they take on actual values in the range [0, 120]. Suppose N=5, our r.v.s might be “realized” to the values (A_1=17, A_2=56, A_3=17, A_4=4, A5=33). “Realizing” a single r.v. translates to