sample mean and range.

A design engineer wants to construct a mean chart for controlling the diameter for a component used in surgeries. The following table contains measurements (in millimeters) of the diameter for a component. Four samples of five units each were taken at random two-hour intervals. What is the sample mean for Sample 1? Sample Measurements (in millimeters) 1 8 9 10 9 8 2 9 7 9 9 8 3 8 9 9 10 10 4 9 9 9 9 9 8.5 10 8.8 8 9 A design engineer wants to construct a mean chart for controlling the diameter for a component used in surgeries. The following table contains measurements (in millimeters) of the diameter for a component. Four samples of five units each were taken at random two-hour intervals. What is the sample range for Sample 1? Sample Measurements (in millimeters) 1 8 9 10 9 8 2 9 7 9 9 8 3 8 9 9 10 10 4 9 9 9 9 2 O @ 3 2 1 None of the these