Does anyone know this?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

30 ! the graph shows the number of siblings different students have. select from the drop-down menus to correctly complete the statement.