I need help on this small statistical test exercise

You have a sample of 6 monthly returns for a mutual fund:
Month Return
1 −3%
2 5%
3 5%
4 6%
5 0%
6 4%

The population standard deviation of returns is 3.2361%, their sample standard deviation is 3.5449%. Use an appropriate statistical test to test whether their average is greater than zero.


Less is more. Stay pure. Stay poor.
What don't you understand? What have you covered in class? They have also provided data, which can be used for calculating the mean and also the sample size.