How do I estimate the population mean of the individual household size of the following data.

How do I estimate the population mean of the individual household size of the following data. I interviewed seven people and found that the have the total number of people living in their household; 2, 1, 4, 3, 5, 2, and 3. I need to calculate a 95% confidence interval for the population mean. I also need to know how I would then test this hypothesis at the .05 significance level.