Question

95% confidence intervals for the two experimental groups are shown to overlap,

a. Indicating a statistically significant difference between the groups.
b. Indicating a lack of statistical difference between the groups.
c. Suggesting a need for additional analysis.
d. Supporting the null hypothesis."

Answer 1

When the 95% confidence intervals for two experimental groups overlap, it indicates a lack of statistical difference between the groups.

Step-by-step explanation:

The correct answer is b. Indicating a lack of statistical difference between the groups.

When the 95% confidence intervals for two experimental groups overlap, it suggests that there is no statistically significant difference between the groups. This means that any observed differences in the means of the groups could likely be due to random chance rather than a true difference in the populations they represent. Therefore, additional analysis or a different statistical test may be needed to determine if there is a significant difference between the groups.