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use the empirical rule the main speed of a sample of vehicles along a stretch of...

use the empirical rule the main speed of a sample of vehicles along a stretch of highway is 63 mph with a standard deviation of 5 mph estimate the percent of vehicles his speeds are between 53 mph and 73 mph. (assume the data set has a bell shaped distribution)
approximately ____% of vehicles travel between 53 mph and 73 mph
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approximately _95___% of vehicles travel between 53 mph and 73 mph

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