5. Identify the variable in the information below. The archeological site of Tara is more than 4000 years old. Trad ition states that Tara was the seat of the high kings of Ireland. Because of its archeological importance, Ta ra has received e xtensive study (Refe rence: Ta ra: An Archeological survey by Conor Newman, Royal Irish Academy, Dublin). Suppose an archeologist wants to estimate the density of ferro magnetic artifacts in the Tara reg ion. For this purpose, a random sa mple of 55 2 plots, each of size 100 square meters, is used. The number of ferro magnetic art ifacts for each plot is

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