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Module 04 Quiz:rcenwb-ob-1p A paint manufacturer made a modification to a paint to speed up its drying time.

d. The confidence interval includes only positive values, which suggests that the two population means might be equal. There doesn't appear to be a significant difference between the mean drying time for paint type A and the mean drying time for paint type B. The modification does not seem to be effective in reducing drying times.

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