In mediation analysis using Hayes (2018) PROCESS it is noted that if the upper and lower bounds of the 95% Confidence Intervals (CIs) do not contain zero, the indirect effect is considered significant."
I do not understand you question but if the mean is 2,5 the CI95 could be for example 1.24 to 3.50 depending on you data. It is not 0 but it can be below 0. Like
Mean 1,5 and CI95 -0.75 to 2.63 for example
I do understand your question either. What are you trying to test?
D. Booth
The question is not clear. If the CI95 contains zero or not depends on your data. For example, if you use a z score it can contain zero.
Thanks all for the answers. Managed to find the meaning in an article "Conducting mediation analysis in marketing research" by Carsten Leo Demming, Steffen Jahn and Yasemin Boztug (2017) which on page 83 states that
The results of the percentile bootstrap in Fig 8 indicate that the proposed indirect effect is significantly different from zero, as the confidence interval does not include zero (meaning it does not encompass positive and negative values).
Thanks for your research .The article was very helpful and the Process modelling simplifies the treatment of intervening variables .
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