Long description: qcfig9

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A line graph titled Sample mean weight versus Sample number, showing fluctuations in weight measurements across samples 1 to 30.

Alt text: A line graph titled Sample mean weight versus Sample number, showing fluctuations in weight measurements across samples 1 to 30.

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  • The graph plots the sample mean weight in grams on the vertical axis, ranging from 195.00 to 205.00, against the sample number on the horizontal axis, which runs from 1 to 30.
  • The data points are connected by a line, illustrating the sample mean weight for each sample.
  • Upper and lower control limits are drawn on the graph: the upper control limit (UCL) is set at 203.07 grams, and the lower control limit (LCL) is set at 197.41 grams.
  • A center line, representing the overall mean (\(\bar{x}\)), is drawn at 199.24 grams.
  • The sample mean weight fluctuates over the 30 samples, generally staying between 198.00 grams and 201.50 grams, occasionally approaching the control limits.

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