Confidence Intervals · Easy problem

If this method were repeated on many random samples, about $95\%$ of the intervals built would contain $\mu$.

There is a $95\%$ probability that $\mu$ lies between $12.1$ and $15.3$, and a $5\%$ probability it lies outside.

About $95\%$ of the individual values in the population lie between $12.1$ and $15.3$.

About $95\%$ of all sample means will fall between $12.1$ and $15.3$.