7.117 The manufacture of dyed clothing fabrics.
Different fabrics respond differently when dyed. This matters to clothing manufacturers, who want the color of the fabric to be just right. Fabrics made of cotton and of ramie are dyed with the same “procion blue’’ dye applied in the same way. A colorimeter is used to measure the lightness of the color on a scale in which black is 0 and white is 100. Here are the data for eight pieces of each fabric:41
dyeclr
| Cotton | 48.82 | 48.88 | 48.98 | 49.04 |
| 48.68 | 49.34 | 48.75 | 49.12 | |
| Ramie | 41.72 | 41.83 | 42.05 | 41.44 |
| 41.27 | 42.27 | 41.12 | 41.49 |
Which fabric is darker when dyed in this way? Write an answer to this question that includes summary statistics and a test of significance.
7.117
For Cotton: . For Ramie: There is significant evidence that lightness of color is different for the different fabrics.