4-5 An engineer wishing to determine whether there is a statistically significant difference between the average speed o

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4 5 An Engineer Wishing To Determine Whether There Is A Statistically Significant Difference Between The Average Speed O 1 (112.29 KiB) Viewed 57 times

4-5 An engineer wishing to determine whether there is a statistically significant difference between the average speed of passenger cars and that of large trucks on a section of highway, collected the data shown below. Determine whether the engineer can con- clude that the average speed of large trucks is the same as that for passenger cars. Average Speed (mi/h) Standard deviation of speed + mi/h Sample size Trucks 62 5.5 275 Passenger Cars 59 6.3 175