Highway Speeds 70 65 65 62 70 64 65 60 65 65 65 64 66 66 63 60 70 63 67 68 70 65 66 67 63 60 70 66 67 68 70 68 69 70 62

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Highway Speeds70656562706465606565656466666360706367687065666763607066676870686970626470686965

Highway Speeds 70 65 65 62 70 64 65 60 65 65 65 64 66 66 63 60 70 63 67 68 70 65 66 67 63 60 70 66 67 68 70 68 69 70 62 1 (86.07 KiB) Viewed 12 times

A police officer is concerned about speeds on a certain section of Interstate 90. The data accompanying this exercise show the speeds of 40 cars on a Saturday afternoon. (You may find it useful to reference the t table.) pictureClick here for the Excel Data File a. The speed limit on this portion of Interstate 90 is 65 mph. Specify the competing hypotheses in order to determine if the average speed of cars on Interstate 90 is greater than the speed limit. He: μ = 65; HA: μ # 65 O Ho: 265; HA: μ< 65 ΗΘ: με 65; ΗΔ: μ > 65 b-1. Calculate the value of the test statistic. (Round final answer to 3 decimal places.) Test statistic b-2. Find the p-value. O p-value < 0.01 O 0.01 ≤ p-value < 0.025 O 0.025 ≤ p-value < 0.05 O 0.05 ≤ p-value < 0.10 O p-value ≥ 0.10 c. At a = 0.01, are the officer's concerns warranted? At 1% significant level, we is greater than the speed limit. conclude that the average speed