Walter B. answered • 07/18/18

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The answer is:

**The two group means are significantly different.**

How do we know this?

What would be the difference if the means were the same. It would be 0.

Does the 95% confidence contain 0, no because the interval is from -1.23 to -.33. Only if one sign is negative and the other is positive, does that interval contain zero.

Therefore the differences in the mean are significantly different from 0.

Hope this helps.