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another centeral limite theorem

rachelschmugge

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Joined
Oct 12, 2009
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An aircraft strobe light is designed so that the times between glashes are normally distributed with a mean of 3.00 seconds and a standard deviation of 0.40 seconds. Find the probability that the mean for 60 randomly selected times is greater than 4.00 seconds. Round answer to 4 decimal places.
 
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