How much noisier are streets where cars travel faster? An article rep kilometers per hour for a sample of roads. The following table pres Speed Noise 28.26 78.1 36.22 79.6 38.73 810 29.07 78.7 30.28 78.6 30.25 78.2 29.03 78.4 33.17 79.6 els in decibels and average speed in Find a 95% confidence interval for the mean noise level for streets whose average speed is 30 kilometers per hour. (Round the final answers to three decimal places.) The 95% confidence interval for the mean is (

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