APFIVE Interpreting Expected Value
A discrete random variable X represents the number of manufacturing defects found in a randomly selected car from a production line. If E(X) = 1.8, which of the following is the most appropriate interpretation of this parameter?
A
Most cars have exactly 1.8 defects
B
1.8% of all cars have at least one defect
C
A randomly selected car will have 1.8 defects
D
The average number of defects per car is 1.8
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