During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard deviation 8 mph. A simple random sample of 55 cars is obtained. Find P(x < 44) Interpret the answer from #7 as a proportion.

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Q: ) Show that A = 3. (b) Find P(2 ≤X ≤3). (c) Find E(X).

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