A quality control engineer needs to ensure that the caps on shampoo bottles are fastened correctly. If the
be too difficult to remove. The target torque value for fastening the caps is 18. The engineer collects a
random sample of 68 bottles and tests the amount of torque that is needed to remove the caps.
As part of the initial investigation, the engineer creates a histogram of the torque to evaluate the
Interpreting the results
Most caps were fastened with a torque of 14 to 24. Only one cap was very loose, with a torque of less
than 11. However, the distribution is positively skewed. Many caps required a torque of greater than 24 to