Normal distribution problem
I have a question on the following problem:
The number of tons of ore produced in a mine every week is a random variable with mean 10 and standard deviation 16. If production is observed for 64 weeks, calculate:
For the mine is closed, the average production during the 64 weeks should be at least 14 tons. What is the probability that the mine be closed?
I did the following:
Calculate the probability that the average is above 14. In this case, use:
where, Substituting, we find that With this finds your chance.
is right or wrong?
Thank you very much as always ...
A big welcome