Confidence Interval for mean

#1
Hello
in a statistical problem, the population standard deviation was given to be 3 and the sample size is 49. in the problem i was asked to use 99% confidence interval for single population mean,but the problem is i don't have the sample mean!!>>what should i do??
 

Dason

Ambassador to the humans
#2
What would you do if you had the sample mean? Give your answer in terms of \(\bar{x}\). That's probably what they're looking for you to do.