The following data are from a production process that makes approximately 250 units each hour. The data were collected over a normal 12-hour shift one day. Historical data shows the proportion of defects to be 6.21%. Either use technology to accommodate the different sample sizes, or use 250 as an approximation for all of them.

Assuming the process was previously in control,
a)€‚Calculate the center line.
b)€‚Create a p chart for these samples.
c)€‚Is this process out of control?

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No. of Defects 13 18 Sample Size 241 Hour 265 256 249 221 276 244 261 259 243 237 257 252 260 245 255 262 14 20 19 12 17 14 12 18 15 20 19 14 244 270 20 18