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A manufacturer of circuit boards reports that the mean lengthof a circuit board is 18 inches.A sample of themanufacturer's circuitboards will be selected at random.

A manufacturer of circuit boards reports that the mean lengthof a circuit board is 18 inches.A sample of themanufacturer's circuitboards will be selected at random. Suppose the sampling distribution of the sample mean is approximately normally distributed with mean 18inches and standard deviation 0.6 inches. What is the probability that the mean length of the circuit boards is at least 17.1 inches?

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