How much less wrinkling? You found that the Hylite process results in significantly greater wrinkle resistance thatn the permafresh process results in significantly geater wrinkle resistance than the Permafresh process. How large is the difference in mean wrinkle recovery angle? Give a 90% confidence interval.
Here are the data on the wrinkle recovery angle (in degrees) for the same fabric swatches:
Permafresh |
136 |
135 |
132 |
137 |
134 |
Hylite |
143 |
141 |
146 |
141 |
145 |