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The mean of nonresidential buildings is 30 years and the standard deviation of the ages of the buildings is 5 years. Determine the probability that a random sample of a group of 50 nonresidential buildings will have a mean age of less than 27.5 years.
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In order to qualify for the finals in a racing event, a car must achieve an average speed of 270 Km/h on a track with a total length of 1410 m. If a particular car covers the first half of the track at an average speed of 232 km/h, what minimum average speed must it have in the second half of the... View more questions Search
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