**11. Correct. The
answer is false**. Let X_{i}
be a random variable which represents the weight of an ore load ' i' .
Then, E[X_{i}] = 300 and σ_{Xi}
= 50. According to the Central Limit Theorem, the sum of a random sample of 25
ore loads follows a normal distribution:

##

## The requested probability is P[S > 8,200]. Standardizing S, we have
that:

##

_{}