Thermostats are subjected to rigorous testing before they are shipped to air conditioning technicians around the world. Results from the last five samples are shown in the table
Calculate control limits for a chart that will monitor performance to target. The correct control limits as (LCL,UCL) are:
Unit # Sample 1 Sample 2 Sample 3 Sample 4 Sample 5
1 73.5 70.8 72.2 73.6 71.0
2 71.3 71.0 73.1 72.7 72.2
3 70.0 72.6 71.9 72.4 73.3
4 71.1 70.6 70.3 74.2 73.6
5 70.8 70.7 70.7 73.5 71.1
A) (70.46, 73.39)
B) (68.94,74.89)
C) (69.71,74.14)
D) (69.80,74.05)
A
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Indicate whether the statement is true or false