The quality control system in a plant that makes acoustical ceiling tile uses a proximity sensor to measure the thickness of the wet pulp layer every 2 feet along the sheet, and the roller speed is adjusted based on the last 20 measurements. Briefly, the speed is adjusted unless the probability that the mean thickness lies within ±2% of the sample mean exceeds 0.99. A typical set of measurements (in mm) is as follows:
![2138_afe2d554-0266-4922-bfd5-8e80ed621359.png](https://secure.tutorsglobe.com/CMSImages/2138_afe2d554-0266-4922-bfd5-8e80ed621359.png)
Would the speed of the rollers be adjusted based on these measurements?