Table 1: Means and Standard Deviations of the Sum of the Corresponding Top and Bottom Mark Area (Pixels) Data Grouped by Load Level (Newtons) - Rounded to the Nearest Pixel
|  | Force (N) | 
|  | 25 | 50 | 100 | 150 | 200 | 
| Mean | 69 | 136 | 243 | 300 | 414 | 
| SD | 151 | 246 | 281 | 333 | 364 | 
|  | 250 | 300 | 350 | 400 | 450 | 
| Mean | 505 | 588 | 644 | 732 | 733 | 
| SD | 378 | 382 | 338 | 367 | 359 |