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Let X = time (in seconds) to react to brake lights during in-traffic driving. We assume X N ( = 2, ^2 = 0.36): Suppose

Let X = time (in seconds) to react to brake lights during in-traffic driving. We assume X N ( = 2, ^2 = 0.36): Suppose that we take a random sample of n = 25 drivers with times X_1,,,X_25. (a) What is the distribution of the sample mean X? (b) Find P (X > 2.1)

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