I have performed an unpaired t-test comparing the means of two groups. My hypothesis was that the stroke group mean would be significantly higher than the control group mean. However, the t-test revealed no significant difference. Here are the results:
control mean stroke mean p value 95% confidence interval 0.0864 0.0927 0.76 -0.0388 to 0.0263
I understand that the range of the CI is high, suggesting that the study was underpowered. However, do the CI infer anything else about the possible true effect? So, the CI is located more within the negative zone than the positive zone. Does this mean that it is more likely that the control mean could be higher than the stroke mean?