A machine produces parts on an assembly line for an automotive manufacturer. If a part is defective it must be scrapped. Every hour, the manager takes a random sample of 15 parts to test whether the process is "out of control" (i. e. to test whether the average proportion of defective parts exceeds 10%). Which of the following is a Type I error for this situation?
a. A Type I error for this situation would be to incorrectly conclude that the process is out of control.
b. A Type I error for this situation would be to conclude that an out of control process is out of control.
c. A Type I error for this situation would be to conclude that an out of control process is in control.
d. A Type I error for this situation would be to correctly conclude that the process is in control.
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