josephstreet7607 josephstreet7607

20-10-2022
Mathematics

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the police department is investigating the need for a speed camera to be implemented on swift road. a sample of 61 cars passing through that road on a particular day were randomly selected and their speeds recorded. the speed limit on swift road is 60 miles per hour (mph). the mean speed for the sample was calculated as 40 mph. the standard deviation of the speeds for the sample was calculated as 6 mph. the standard deviation for the population of cars driving on swift road is unknown.

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