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Satistical Summary Table Ch08ConditionFindToolFormula(known σ)Normal distribution or any distribution n ≥ 30[pic 1]Z[pic 2](known σ)Normal distribution or any distribution n ≥ 30n > 5% N[pic 3]Z[pic 4](unknown σ)Normal distribution n < 30[pic 5]t[pic 6] df = n - 1n is largenp > 5nq > 5pZ[pic 7]Normal distribution[pic 8][pic 9][pic 10]want to find [pic 11]nZ[pic.