An I^2 value of 0% indicates what about heterogeneity?

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Multiple Choice

An I^2 value of 0% indicates what about heterogeneity?

Explanation:
The I^2 statistic measures how much of the variation in study results in a meta-analysis is due to real differences between studies rather than random chance. An I^2 value of 0% means that all observed variability can be explained by sampling error, so there is no evidence of heterogeneity—the study results are effectively consistent with one another. Values around 25% are considered low heterogeneity, around 50% moderate, and around 75% or higher high heterogeneity, which is why the 0% value points to no observed heterogeneity.

The I^2 statistic measures how much of the variation in study results in a meta-analysis is due to real differences between studies rather than random chance. An I^2 value of 0% means that all observed variability can be explained by sampling error, so there is no evidence of heterogeneity—the study results are effectively consistent with one another. Values around 25% are considered low heterogeneity, around 50% moderate, and around 75% or higher high heterogeneity, which is why the 0% value points to no observed heterogeneity.

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