One Variance: Sample Size Calculation Results - Quick Tab

Calculating Required Sample Size

Select the Quick tab of the One Variance: Sample Size Calculation Results dialog box to access options to interactively view the results of sample size calculations and generate plots of required sample size as a function of quantities that affect sample size in practice.  

X-Axis Graphing Parameters
The entries in the boxes under X-Axis Graphing Parameters establish the start value, end value, and number of steps on the X-axis for the graphs specified under Sample Size Charts.
Start Power
In the Start Power box, enter the starting value of power goal used in the Df vs. Power  sample size chart.
End Power
In the End Power box, enter the final value of power goal used in the Df vs. Power  sample size chart.
Start Var
In the Start Var box, enter the starting value of Var used in the Df vs. Var sample size chart.
End Var
In the End Var box, enter the final value of Var used in the Df vs. Var sample size chart.
Start Alpha
In the Start Alpha box, enter the starting value of a used in the Df vs. Alpha sample size chart.
End Alpha
In the End Alpha box, enter the final value of a used in the Df vs. Alpha sample size chart.
No. of Steps.
In the No. of Steps box, enter the number of steps, or intervals, plotted on the X-axis in the power charts specified in the Sample Size Charts box.
Sample Size Charts
Use the buttons under Sample Size Charts to produce charts of required N as a function of power goal, population variance, or type I error rate. The range of values plotted on the X-axis, and the number of steps plotted, are controlled by parameters in the X-Axis Graphing Parameters box.  
Df vs. Var.
Click the Df vs. Var button to produce a plot of degrees of freedom (Df) versus population variance (Var).
Df vs. Alpha.
Click the Df vs. Alpha button to produce a plot of degrees of freedom (Df) vs. Type I error rate.
Df vs. Power.
Click the Df vs. Power button to produce a plot of degrees of freedom (Df) versus power goal.