A Length of Chain Is to Be Constructed by Placing

Multiple Choice

A length of chain is to be constructed by placing 36 component links end to end.The length of a link produced by a production process is known to be a random variable with a mean of  = 2.5 centimeters and a standard deviation of  = 0.2 centimeters.The 36 links are chosen at random from this process to produce the chain.The mean and standard deviation of the length of chain are,respectively,_________.

A) 90 centimeters and 7.2 centimeters
B) 36 centimeters and 1.2 centimeters
C) 90 centimeters and 2.7 centimeters
D) 90 centimeters and 1.2 centimeters
E) 36 centimeters and 7.2 centimeters