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1.
Select DOE > Design Diagnostics > Sample Size and Power.
2.
Click One Sample Standard Deviation.
3.
Leave Alpha as 0.05.
4.
Enter 10 for Hypothesized Standard Deviation.
5.
Select Larger for Alternative Standard Deviation.
6.
Enter 2.4499 for Difference to Detect.
7.
Leave Sample Size blank.
8.
9.
Click Continue.
Figure 17.11 One-Sample Standard Deviation Calculator

Help created on 3/19/2020