A new printing machine is set or calibrated to print 25 copies per minute. On each of four days, the printer's output is measured five times. The data will be used to construct a process control chart to monitor the printing process. The results of the printing process are in the following table. 
What is the mean for Day 1?
Definitions:
Strike-Slip Fault
A type of fault where two blocks of the Earth's crust slide past one another in a horizontal direction, with little to no vertical movement.
Horizontal Offset
The displacement of the Earth's surface along a fault line, measured in a horizontal direction.
Fault Scarp
A steep slope or cliff formed as a result of movement along a geological fault, typically found at the Earth's surface.
Carbon-14
A carbon isotope that emits radiation, utilized in radiocarbon dating to ascertain the age of organic matter.
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