A machine is expected to produce nails of 7cm length. A random sample of 10 nails were found to measure: 7.2 , 7.3 , 7.1 , 6.9 , 6.8 , 6.5 , 6.9 , 6.8 , 7.1 and 7.2 cm. On the basis of this sample, what can be said about the reliability of the machine?
0.05 = 2.267 9 .
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12.4
4.5
2269 is the answer please make me brainliest answer please
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