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Question: a city council collected data on driving speeds in order...

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A city council collected data on driving speeds in order to decide on appropriate speed limits. On a major street the mean speed was 38.6 mph, with a standard deviation of 4.3 mph. On a residential street, speeds had a mean of 22.1 mph and a standard deviation of 2.4 mph. Relative to the other traffic on that street, which of the following speeds is greater: 49 mph on the major street or 28 mph on the residential street? Show the calculations that justify your answer, round the results to two decimal places

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