This version uses the McClave approach for n <30. If n >30, use the z-calculator here. Enter your data in the blue cells, select the math operator of the alternative hypothesis in the orange drop-down box [to see the operator dropdown menu, left-click in the cell, e.g. on the current operator], and the yellow answer cells will be updated. Note: you will have to scroll to the right on the Raw Data version to find the blue cells where you enter your data.