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## Workers at a large toxic cleanup project are concerned that their white blood cell counts may have been reduced. Let x be a random variable that represents white blood cell count per cubic millimeter of whole blood in a healthy adult. Then μ = 7500 and  σ ≈ 1750.†   A random sample of  n = 70 workers from the toxic cleanup site were given a blood test that showed x = 6950.What is the probability that, for healthy adults, x will be this low or lower?     (b) Compute  P(x ≤ 6950). (Round your answer to four decimal places.) P(x ≤ 6950) = ?

Workers at a large toxic cleanup project are concerned that their white blood cell counts may have been reduced. Let x be a random variable that represents white blood cell count per cubic millimeter of whole blood in a healthy adult. Then μ = 7500 and

σ ≈ 1750.†

A random sample of  n = 70 workers from the toxic cleanup site were given a blood test that showed x = 6950.What is the probability that, for healthy adults, x will be this low or lower?

(b) Compute  P(x ≤ 6950). (Round your answer to four decimal places.)

P(x ≤ 6950) = ?
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