91影视

The difference in mean egg mass between birds with small nests and birds with large nests has a $95\%$confidence interval of:

role="math" localid="1654715011426" $$\begin{gathered} 1.6卤2.0=(1.6-2.0,1.6+2.0) \\ =(-0.4,3.6) \end{gathered}$$

Then we notice that the confidence interval contains zero, implying that the difference in mean reaction time is likely to be zero, and thus that no difference exists.

This means that there is no convincing evidence of a difference in true mean egg mass between birds with small and large nests.

The difference in mean egg mass between birds with small nests and birds with large nests has a $95\%$confidence interval of:

$$\begin{gathered} 1.6卤2.0=(1.6-2.0,1.6+2.0) \\ =(-0.4,3.6) \end{gathered}$$

Then we notice that the confidence interval contains zero, implying that the difference in mean reaction time is likely to be zero, and thus that no difference exists.

There is no evidence that the true mean egg mass of birds with small nests and birds with large nests is the same because the difference of zero is one of the plausible values, but the confidence interval for the difference contains many other plausible values.