If a researcher performs a meta-analysis and finds that the mean d = 0.11, and that the 95 percent confidence interval around this mean is (-0.04, 0.26), what could the researcher conclude?
A) All future studies of this effect will find effect sizes somewhere between 0.34 and 0.56.
B) Averaging across all of the literature, there really is no effect.
C) There is a strong effect, but it is unclear what the direction of the effect is.
D) Averaging across all of the literature, there is a strong effect, and this effect is statistically significant.

Question

Quizplus · Accepted Answer

The confidence interval includes zero (-0.04, 0.26), suggesting that the effect might not be statistically significant and that there is a possibility of no real effect across the studies analyzed.

If a Researcher Performs a Meta-Analysis and Finds That the Mean