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An article claims that 12 of trees are infested by a bark beetle A random sample of 1 00 trees were tested for traces of the infestation and found that 127 trees were affected Z p pq n Using the formula and data provided what is the value of the z test statistic Answer choices are rounded to the hundredths place a 0 25 b 0 68 O c 0 50 d 0 35
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