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Figure from:Statistics review 4: sample size calculations

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Nomogram showing the statistical power for a standardized difference of 0.095 and a total sample size of 304.

Figure 6 Nomogram showing the statistical power for a standardized difference of 0.095 and a total sample size of 304.

Related Figures (7)

Factors that affect sample size calculations Table 1
Factors that affect sample size calculations Table 1
Nomogram for calculating sample size or power. Reproduced from Altman [5], with permission.
Nomogram for calculating sample size or power. Reproduced from Altman [5], with permission.
Nomogram showing sample size calculation for a standardized difference of 0.78 and 80% power.
Nomogram showing sample size calculation for a standardized difference of 0.78 and 80% power.
Commonly used values for C,, owe, Table 2 In this case the standardized difference is given by the follow- ing equation:
Commonly used values for C,, owe, Table 2 In this case the standardized difference is given by the follow- ing equation:
Nomogram showing sample size calculation for a standardized difference of 0.78 and 95% power.
Nomogram showing sample size calculation for a standardized difference of 0.78 and 95% power.
Nomogram showing sample size calculation for standardized difference of 0.188 and 90% power.
Nomogram showing sample size calculation for standardized difference of 0.188 and 90% power.
Nomogram showing the statistical power for a standardized difference of 0.188 and a total sample size of 861.
Nomogram showing the statistical power for a standardized difference of 0.188 and a total sample size of 861.