b-1. Calculate the standard deviation for Highway 1. Note: Round final answer to 2 decimal places. b-2. Calculate the standard deviation for Highway 2. Note: Round final answer to 2 decimal places. c. Does the data support the researcher's beliel? Yes, because Highway 1 has a lower typical speed with a higher variablity in speed. Yes, because Highway 1 has a lower fypical speed with a lower varlability in speed. No, because Highway 2 has a higher typical speed with a higher variability in speed. No, because Highway 2 has a lower typical speed with a lower variability in speed. Many environmental groups and politicians are suggesting a return to the federal 55 -mile-per-hour (mph) speed limit on America's highways. They argue that not only will a lower national speed limit reduce greenhouse emissions, it will also increase traffic safety. A researcher believes that a lower speed limit will not increase traffic safety because he feels that traffic safety is based on the variability of the speeds with which people are driving, rather than the overage speed. The researcher gathers the speeds of 40 cars from a highway with a speed limit of 55 mph (Highway ) and the speeds of 40 cars from a highway with a speed limit of 65 mph (Highway 2). Click here fot the Excel Data File a-1. Calculate the mean and the median for Highwoy 1 . Note: Round final answers to 1 decimal place. a-2. Calculate the mean and the median for Highway 2 Note: Round finat answers to 1 decimal place