gIf you determine that the upper and lower limits of a 99% confidence interval are 50 and 60, you can conclude that there is a 99% chance that the sample mean is between 50 and 60.

What the question says is true.

Step-by-step explanation:

A x% confidence interval in the format (lower end, upper end) of a sample mean means that we are x% sure, that is, there is a x% chance, that the true mean of the sample is in this interval.

In this problem, we have that:

99% confidence interval is (50,60)

So there is a 99% chance that the sample mean is between 50 and 60.

So what the question says is true.