Modern Passenger Railroad Control Car - Buy Royalty Free 3D model by KolorowyAnanas

Modern Passenger Railroad Car - Buy Royalty Free 3D model by KolorowyAnanas

The average age of Amtrak passenger train cars is 19.4 years. If the distribution of ages is normal and 20% of the cars are older than 22.8 years, find the standard deviation. | Numerade

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SOLVED: Ages of Passenger Cars The average age of passenger train cars is 19.4 years. If the distribution of ages is normal and 7%/ of the cars are older than 22.7 years, find the standard deviation. Round z-value calculations to 2 decimal places and final answer to 2 decimal placesThe standard deviation must beyears.

In April 1974, John Massis of Belgium managed to move two passenger railroad cars. He did so by clamping his teeth down on a bit that was attached to the cars with a rope and then leaning backward while pressing his feet against the railway ties. The cars together weighed 700 kN (about 80 tons). Assume that he pulled with a constant force that was 2.5 times his body weight, at an upward angle θ of 30° from the horizontal. His mass was 80 kg, and he moved the cars by 1.0 m. Neglecting any retar

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