It Is Advertised That The Average Braking Distance For A Small Car Traveling At 75 Miles Per Hour Equals 120 Feet A Tran 1 (29.09 KiB) Viewed 9 times
It Is Advertised That The Average Braking Distance For A Small Car Traveling At 75 Miles Per Hour Equals 120 Feet A Tran 2 (32.02 KiB) Viewed 9 times
It is advertised that the average braking distance for a small car traveling at 75 miles per hour equals 120 feet A transportation researcher wants to determine if the statement made in the advertisement is false. She randomly test drives 38 small cars at 75 miles per hour and records the braking distance. The sample average braking distance is computed as 112 feet. Assume that the population standard deviation is 20 feet. (You may find it useful to reference the appropriate table: ztable or table) a. State the null and the alternative hypotheses for the test OHH 120; HA! H 120 OHH 2 120; MA: <120 ONGS 120; MA: > 128 P b. Calculate the value of the test statistic and the p-value. (Negative value should be indicated by a minus sign. Round final answer to 2 decimal places.) Test statistic
Find the p-value. O 0.025 s p-value < 0.05 0 0.05 < p-value <0.10 O p-value 2010 Op-value < 0.01 0 0.01 s p-value < 0.025 c. Use a = 0.10 to determine if the average breaking distance differs from 120 feet. from 120 feet The average breaking distance
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