If the zero belong to the confidence interval for the standard deviation of the random effect models can I conclude that the random effect is not statistically significant?

  • $\begingroup$ Generally speaking if the null value of the parameter falls into say a 95% confidence interval you cannot reject the null hypothesis and the 0.05 level. But the effect is not the standard deviation. It is the mean. So you would need more. $\endgroup$ – Michael R. Chernick May 10 '17 at 2:41

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