Latest exam Aptitude Question SOLUTION: 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.

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(#M40089815) EXAM Numerical Ability question Keep an EYE

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.

Asked In exam (9 years ago)

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