Power and Sample Size for One-Way ANOVA
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Stat > Power and Sample Size > One-Way ANOVA

Use to calculate one of the following for a test of the equality of population means

·    power

·    sample size

·    minimum detectable difference between the smallest and largest factor means (maximum difference)

You need to determine what are acceptable values for any two of these parameters and Minitab will solve for the third.

For example, if you specify values for power and the maximum difference between the factor level means, Minitab will determine the sample size required to detect the specified difference at the specified level of power. See Defining the maximum difference.

Dialog box items

Number of levels: Enter the number of factor levels (treatment conditions).

Specify values for any two of the following: Specify two values and Minitab will calculate the third.

Sample sizes: Enter one or more sample sizes. Each number you enter is considered the number of observations for every factor level. For example, if you have 3 factor levels with 5 observations each, you would enter 5.

Values of the maximum difference between means: Enter one or more values for the difference between the lowest level mean and highest level mean. See Defining the maximum difference.

Power values: Enter one or more power values.

Standard deviation: Enter an estimate of the population standard deviation (s) for your data. See Estimating standard deviation.

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