I need help with this question please! Thank you!

timer Asked: Jun 11th, 2015

Question description

Exercise 3 in Module 20 examined whether adding a fragrance to a window cleaner led people to believe that it cleans better than unscented product.  There were 12 subjects in each group: scented or unscented.  The mean cleaning effectiveness rating for the group getting the scented cleaner was 7.42. The meaning cleaning effectiveness rating for the group getting unscented was 6.00.  The standard deviation for cleaning effectiveness ratings across all subjects is 1.369.

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