# Confidence Interval for mean

#### osamastat

##### New Member
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

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.