What is statistical power dependent on?

Standard deviation measures the variability within a dataset, but it does not directly influence statistical power. While a smaller standard deviation can increase power by reducing the noise around the effect being measured, it is not a core determinant of power like effect size is. Standard deviation affects the calculation of power but is not the primary factor.

The duration of an experiment can impact power indirectly by allowing more data to be collected, but it is not a direct factor. The length of time does not inherently change the effect size being measured; hence, it does not fundamentally determine statistical power. Power is more closely related to how substantial the observed effect is rather than the time spent measuring it.

Graphical display refers to the visual representation of data, which aids in understanding and interpreting results but does not affect the calculation of statistical power. The effectiveness of a graphical display does not influence the underlying statistical methods or the power of hypothesis tests; therefore, it is irrelevant to the question of what determines statistical power.