# confidence interval 7

**Question description**

A researcher was interested in comparing the heights of women in two different countries. Independent simple random samples of 9 women from country A and 9 women from country B yielded the following heights (in inches).

The following 90% confidence interval was obtained for the difference between the mean height of women in country A and the mean height of women in country B.

-4.34 in. < μ1 - μ2 < -0.03 in

What does the confidence interval suggest about the population means?

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