On all graphs, you can move the cursor to a value on the x -axis and see the related value on the y -axis. This cross hair feature can be turned on or off by choosing Options / Graph / Display Cross Hairs from the menu. The x and y values also appear on the status bar at the bottom of the window in numerical format.
Many designs (the One-Sample t-Test, for example) have a decision performance goal diagram (DPGD). A DPGD allows you to see all the parameters associated with a sampling design. Each of these parameters can be modified by manipulating the graph as follows:
Alpha |
drag the horizontal blue dashed line up or down |
Beta |
drag the horizontal blue dashed line up or down |
Delta (and lower or upper bound of the gray region) |
drag the vertical edge of the shaded gray area left or right |
Standard Deciation |
drag the vertical section of the green line left or right |
Action Level |
drag the vertical red line left or right |
Null Hypothesis |
click on the y-axis title |
As you change these parameters, you can see the new value of the parameter on the status bar. The sampling design is updated based on the parameter you modified, and new samples are placed on the map. For modifying design parameters, you can use the interactive DPGD as an alternative to the sampling design dialog boxes.