Question 364274: a tire company manufactures tires with =35,600 miles and =4,925 miles. If a random sample of 50 tires is taken, what is the probability that the mean life of the tires is less than 35,000 miles?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! a tire company manufactures tires with =35,600 miles and std=4,925 miles. If a random sample of 50 tires is taken, what is the probability that the mean life of the tires is less than 35,000 miles?
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t(35000) = (35000-35600)/[4925/sqrt(50)]= -0.8615
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P(x < 35000) = P(t < -0.8615 when df = 49) = 0.1066
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Cheers,
Stan H.
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